[New LWP 19633]
[New LWP 19634]
[New LWP 19635]
[New LWP 19636]
[New LWP 19638]
[New LWP 19639]
[New LWP 19640]
[New LWP 19641]
[New LWP 19642]
[New LWP 19643]
[New LWP 19644]
[New LWP 19654]
[New LWP 19655]
[New LWP 19656]
[New LWP 19657]
[New LWP 19658]
[New LWP 19659]
[New LWP 19660]
[New LWP 19661]
[New LWP 19662]
[New LWP 19663]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
0x00007f4f1962beb7 in sched_yield () at ../sysdeps/unix/syscall-template.S:84

Thread 22 (Thread 0x7f4ea3fff700 (LWP 19663)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x000055c66b4448ef in __gthread_cond_timedwait (__cond=0x55c66ede72d0, __mutex=0x55c66edd7fd0, __abs_timeout=0x7f4ea3ffec00) at /usr/include/x86_64-linux-gnu/c++/6/bits/gthr-default.h:871
#2  0x000055c66b448c3b in std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x55c66ede72d0, __lock=..., __atime=...) at /usr/include/c++/6/condition_variable:166
#3  0x000055c66b447d5b in std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x55c66ede72d0, __lock=..., __atime=...) at /usr/include/c++/6/condition_variable:106
#4  0x000055c66b447449 in std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (this=0x55c66ede72d0, __lock=..., __rtime=...) at /usr/include/c++/6/condition_variable:138
#5  0x000055c66b444ac3 in tpool::thread_pool_generic::wait_for_tasks (this=0x55c66edd7ec0, lk=..., thread_data=0x55c66ede72d0) at /data/src/10.5/tpool/tpool_generic.cc:418
#6  0x000055c66b444cd3 in tpool::thread_pool_generic::get_task (this=0x55c66edd7ec0, thread_var=0x55c66ede72d0, t=0x7f4ea3ffed28) at /data/src/10.5/tpool/tpool_generic.cc:471
#7  0x000055c66b444f60 in tpool::thread_pool_generic::worker_main (this=0x55c66edd7ec0, thread_var=0x55c66ede72d0) at /data/src/10.5/tpool/tpool_generic.cc:516
#8  0x000055c66b44b207 in std::__invoke_impl<void, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(std::__invoke_memfun_deref, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__f=@0x7f4ec8001658: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55c66b444efc <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:227
#9  0x000055c66b44b179 in std::__invoke<void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__fn=@0x7f4ec8001658: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55c66b444efc <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:251
#10 0x000055c66b44b10d in std::_Mem_fn_base<void (tpool::thread_pool_generic::*)(tpool::worker_data*), true>::operator()<tpool::thread_pool_generic*, tpool::worker_data*>(tpool::thread_pool_generic*&&, tpool::worker_data*&&) const (this=0x7f4ec8001658, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:604
#11 0x000055c66b44b0bf in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::_M_invoke<0ul, 1ul>(std::_Index_tuple<0ul, 1ul>) (this=0x7f4ec8001648) at /usr/include/c++/6/functional:1391
#12 0x000055c66b44afbd in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::operator()() (this=0x7f4ec8001648) at /usr/include/c++/6/functional:1380
#13 0x000055c66b44af9c in std::thread::_State_impl<std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)> >::_M_run() (this=0x7f4ec8001640) at /usr/include/c++/6/thread:197
#14 0x00007f4f19ecde6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#15 0x00007f4f1b50e4a4 in start_thread (arg=0x7f4ea3fff700) at pthread_create.c:456
#16 0x00007f4f19642d0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 21 (Thread 0x7f4ec0ff9700 (LWP 19662)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x000055c66b4448ef in __gthread_cond_timedwait (__cond=0x55c66ede7350, __mutex=0x55c66edd7fd0, __abs_timeout=0x7f4ec0ff8c00) at /usr/include/x86_64-linux-gnu/c++/6/bits/gthr-default.h:871
#2  0x000055c66b448c3b in std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x55c66ede7350, __lock=..., __atime=...) at /usr/include/c++/6/condition_variable:166
#3  0x000055c66b447d5b in std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x55c66ede7350, __lock=..., __atime=...) at /usr/include/c++/6/condition_variable:106
#4  0x000055c66b447449 in std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (this=0x55c66ede7350, __lock=..., __rtime=...) at /usr/include/c++/6/condition_variable:138
#5  0x000055c66b444ac3 in tpool::thread_pool_generic::wait_for_tasks (this=0x55c66edd7ec0, lk=..., thread_data=0x55c66ede7350) at /data/src/10.5/tpool/tpool_generic.cc:418
#6  0x000055c66b444cd3 in tpool::thread_pool_generic::get_task (this=0x55c66edd7ec0, thread_var=0x55c66ede7350, t=0x7f4ec0ff8d28) at /data/src/10.5/tpool/tpool_generic.cc:471
#7  0x000055c66b444f60 in tpool::thread_pool_generic::worker_main (this=0x55c66edd7ec0, thread_var=0x55c66ede7350) at /data/src/10.5/tpool/tpool_generic.cc:516
#8  0x000055c66b44b207 in std::__invoke_impl<void, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(std::__invoke_memfun_deref, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__f=@0x7f4ec80014d8: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55c66b444efc <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:227
#9  0x000055c66b44b179 in std::__invoke<void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__fn=@0x7f4ec80014d8: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55c66b444efc <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:251
#10 0x000055c66b44b10d in std::_Mem_fn_base<void (tpool::thread_pool_generic::*)(tpool::worker_data*), true>::operator()<tpool::thread_pool_generic*, tpool::worker_data*>(tpool::thread_pool_generic*&&, tpool::worker_data*&&) const (this=0x7f4ec80014d8, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:604
#11 0x000055c66b44b0bf in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::_M_invoke<0ul, 1ul>(std::_Index_tuple<0ul, 1ul>) (this=0x7f4ec80014c8) at /usr/include/c++/6/functional:1391
#12 0x000055c66b44afbd in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::operator()() (this=0x7f4ec80014c8) at /usr/include/c++/6/functional:1380
#13 0x000055c66b44af9c in std::thread::_State_impl<std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)> >::_M_run() (this=0x7f4ec80014c0) at /usr/include/c++/6/thread:197
#14 0x00007f4f19ecde6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#15 0x00007f4f1b50e4a4 in start_thread (arg=0x7f4ec0ff9700) at pthread_create.c:456
#16 0x00007f4f19642d0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 20 (Thread 0x7f4ec17fa700 (LWP 19661)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x000055c66b4448ef in __gthread_cond_timedwait (__cond=0x55c66ede73d0, __mutex=0x55c66edd7fd0, __abs_timeout=0x7f4ec17f9c00) at /usr/include/x86_64-linux-gnu/c++/6/bits/gthr-default.h:871
#2  0x000055c66b448c3b in std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x55c66ede73d0, __lock=..., __atime=...) at /usr/include/c++/6/condition_variable:166
#3  0x000055c66b447d5b in std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x55c66ede73d0, __lock=..., __atime=...) at /usr/include/c++/6/condition_variable:106
#4  0x000055c66b447449 in std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (this=0x55c66ede73d0, __lock=..., __rtime=...) at /usr/include/c++/6/condition_variable:138
#5  0x000055c66b444ac3 in tpool::thread_pool_generic::wait_for_tasks (this=0x55c66edd7ec0, lk=..., thread_data=0x55c66ede73d0) at /data/src/10.5/tpool/tpool_generic.cc:418
#6  0x000055c66b444cd3 in tpool::thread_pool_generic::get_task (this=0x55c66edd7ec0, thread_var=0x55c66ede73d0, t=0x7f4ec17f9d28) at /data/src/10.5/tpool/tpool_generic.cc:471
#7  0x000055c66b444f60 in tpool::thread_pool_generic::worker_main (this=0x55c66edd7ec0, thread_var=0x55c66ede73d0) at /data/src/10.5/tpool/tpool_generic.cc:516
#8  0x000055c66b44b207 in std::__invoke_impl<void, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(std::__invoke_memfun_deref, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__f=@0x7f4ec8001358: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55c66b444efc <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:227
#9  0x000055c66b44b179 in std::__invoke<void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__fn=@0x7f4ec8001358: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55c66b444efc <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:251
#10 0x000055c66b44b10d in std::_Mem_fn_base<void (tpool::thread_pool_generic::*)(tpool::worker_data*), true>::operator()<tpool::thread_pool_generic*, tpool::worker_data*>(tpool::thread_pool_generic*&&, tpool::worker_data*&&) const (this=0x7f4ec8001358, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:604
#11 0x000055c66b44b0bf in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::_M_invoke<0ul, 1ul>(std::_Index_tuple<0ul, 1ul>) (this=0x7f4ec8001348) at /usr/include/c++/6/functional:1391
#12 0x000055c66b44afbd in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::operator()() (this=0x7f4ec8001348) at /usr/include/c++/6/functional:1380
#13 0x000055c66b44af9c in std::thread::_State_impl<std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)> >::_M_run() (this=0x7f4ec8001340) at /usr/include/c++/6/thread:197
#14 0x00007f4f19ecde6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#15 0x00007f4f1b50e4a4 in start_thread (arg=0x7f4ec17fa700) at pthread_create.c:456
#16 0x00007f4f19642d0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 19 (Thread 0x7f4ec1ffb700 (LWP 19660)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x000055c66b4448ef in __gthread_cond_timedwait (__cond=0x55c66ede7450, __mutex=0x55c66edd7fd0, __abs_timeout=0x7f4ec1ffac00) at /usr/include/x86_64-linux-gnu/c++/6/bits/gthr-default.h:871
#2  0x000055c66b448c3b in std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x55c66ede7450, __lock=..., __atime=...) at /usr/include/c++/6/condition_variable:166
#3  0x000055c66b447d5b in std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x55c66ede7450, __lock=..., __atime=...) at /usr/include/c++/6/condition_variable:106
#4  0x000055c66b447449 in std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (this=0x55c66ede7450, __lock=..., __rtime=...) at /usr/include/c++/6/condition_variable:138
#5  0x000055c66b444ac3 in tpool::thread_pool_generic::wait_for_tasks (this=0x55c66edd7ec0, lk=..., thread_data=0x55c66ede7450) at /data/src/10.5/tpool/tpool_generic.cc:418
#6  0x000055c66b444cd3 in tpool::thread_pool_generic::get_task (this=0x55c66edd7ec0, thread_var=0x55c66ede7450, t=0x7f4ec1ffad28) at /data/src/10.5/tpool/tpool_generic.cc:471
#7  0x000055c66b444f60 in tpool::thread_pool_generic::worker_main (this=0x55c66edd7ec0, thread_var=0x55c66ede7450) at /data/src/10.5/tpool/tpool_generic.cc:516
#8  0x000055c66b44b207 in std::__invoke_impl<void, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(std::__invoke_memfun_deref, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__f=@0x7f4ec80011d8: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55c66b444efc <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:227
#9  0x000055c66b44b179 in std::__invoke<void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__fn=@0x7f4ec80011d8: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55c66b444efc <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:251
#10 0x000055c66b44b10d in std::_Mem_fn_base<void (tpool::thread_pool_generic::*)(tpool::worker_data*), true>::operator()<tpool::thread_pool_generic*, tpool::worker_data*>(tpool::thread_pool_generic*&&, tpool::worker_data*&&) const (this=0x7f4ec80011d8, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:604
#11 0x000055c66b44b0bf in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::_M_invoke<0ul, 1ul>(std::_Index_tuple<0ul, 1ul>) (this=0x7f4ec80011c8) at /usr/include/c++/6/functional:1391
#12 0x000055c66b44afbd in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::operator()() (this=0x7f4ec80011c8) at /usr/include/c++/6/functional:1380
#13 0x000055c66b44af9c in std::thread::_State_impl<std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)> >::_M_run() (this=0x7f4ec80011c0) at /usr/include/c++/6/thread:197
#14 0x00007f4f19ecde6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#15 0x00007f4f1b50e4a4 in start_thread (arg=0x7f4ec1ffb700) at pthread_create.c:456
#16 0x00007f4f19642d0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 18 (Thread 0x7f4ec27fc700 (LWP 19659)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x000055c66b4448ef in __gthread_cond_timedwait (__cond=0x55c66ede74d0, __mutex=0x55c66edd7fd0, __abs_timeout=0x7f4ec27fbc00) at /usr/include/x86_64-linux-gnu/c++/6/bits/gthr-default.h:871
#2  0x000055c66b448c3b in std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x55c66ede74d0, __lock=..., __atime=...) at /usr/include/c++/6/condition_variable:166
#3  0x000055c66b447d5b in std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x55c66ede74d0, __lock=..., __atime=...) at /usr/include/c++/6/condition_variable:106
#4  0x000055c66b447449 in std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (this=0x55c66ede74d0, __lock=..., __rtime=...) at /usr/include/c++/6/condition_variable:138
#5  0x000055c66b444ac3 in tpool::thread_pool_generic::wait_for_tasks (this=0x55c66edd7ec0, lk=..., thread_data=0x55c66ede74d0) at /data/src/10.5/tpool/tpool_generic.cc:418
#6  0x000055c66b444cd3 in tpool::thread_pool_generic::get_task (this=0x55c66edd7ec0, thread_var=0x55c66ede74d0, t=0x7f4ec27fbd28) at /data/src/10.5/tpool/tpool_generic.cc:471
#7  0x000055c66b444f60 in tpool::thread_pool_generic::worker_main (this=0x55c66edd7ec0, thread_var=0x55c66ede74d0) at /data/src/10.5/tpool/tpool_generic.cc:516
#8  0x000055c66b44b207 in std::__invoke_impl<void, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(std::__invoke_memfun_deref, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__f=@0x7f4ec8001058: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55c66b444efc <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:227
#9  0x000055c66b44b179 in std::__invoke<void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__fn=@0x7f4ec8001058: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55c66b444efc <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:251
#10 0x000055c66b44b10d in std::_Mem_fn_base<void (tpool::thread_pool_generic::*)(tpool::worker_data*), true>::operator()<tpool::thread_pool_generic*, tpool::worker_data*>(tpool::thread_pool_generic*&&, tpool::worker_data*&&) const (this=0x7f4ec8001058, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:604
#11 0x000055c66b44b0bf in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::_M_invoke<0ul, 1ul>(std::_Index_tuple<0ul, 1ul>) (this=0x7f4ec8001048) at /usr/include/c++/6/functional:1391
#12 0x000055c66b44afbd in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::operator()() (this=0x7f4ec8001048) at /usr/include/c++/6/functional:1380
#13 0x000055c66b44af9c in std::thread::_State_impl<std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)> >::_M_run() (this=0x7f4ec8001040) at /usr/include/c++/6/thread:197
#14 0x00007f4f19ecde6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#15 0x00007f4f1b50e4a4 in start_thread (arg=0x7f4ec27fc700) at pthread_create.c:456
#16 0x00007f4f19642d0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 17 (Thread 0x7f4ec2ffd700 (LWP 19658)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x000055c66b4448ef in __gthread_cond_timedwait (__cond=0x55c66ede7550, __mutex=0x55c66edd7fd0, __abs_timeout=0x7f4ec2ffcc00) at /usr/include/x86_64-linux-gnu/c++/6/bits/gthr-default.h:871
#2  0x000055c66b448c3b in std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x55c66ede7550, __lock=..., __atime=...) at /usr/include/c++/6/condition_variable:166
#3  0x000055c66b447d5b in std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x55c66ede7550, __lock=..., __atime=...) at /usr/include/c++/6/condition_variable:106
#4  0x000055c66b447449 in std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (this=0x55c66ede7550, __lock=..., __rtime=...) at /usr/include/c++/6/condition_variable:138
#5  0x000055c66b444ac3 in tpool::thread_pool_generic::wait_for_tasks (this=0x55c66edd7ec0, lk=..., thread_data=0x55c66ede7550) at /data/src/10.5/tpool/tpool_generic.cc:418
#6  0x000055c66b444cd3 in tpool::thread_pool_generic::get_task (this=0x55c66edd7ec0, thread_var=0x55c66ede7550, t=0x7f4ec2ffcd28) at /data/src/10.5/tpool/tpool_generic.cc:471
#7  0x000055c66b444f60 in tpool::thread_pool_generic::worker_main (this=0x55c66edd7ec0, thread_var=0x55c66ede7550) at /data/src/10.5/tpool/tpool_generic.cc:516
#8  0x000055c66b44b207 in std::__invoke_impl<void, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(std::__invoke_memfun_deref, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__f=@0x7f4ec8000ed8: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55c66b444efc <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:227
#9  0x000055c66b44b179 in std::__invoke<void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__fn=@0x7f4ec8000ed8: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55c66b444efc <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:251
#10 0x000055c66b44b10d in std::_Mem_fn_base<void (tpool::thread_pool_generic::*)(tpool::worker_data*), true>::operator()<tpool::thread_pool_generic*, tpool::worker_data*>(tpool::thread_pool_generic*&&, tpool::worker_data*&&) const (this=0x7f4ec8000ed8, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:604
#11 0x000055c66b44b0bf in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::_M_invoke<0ul, 1ul>(std::_Index_tuple<0ul, 1ul>) (this=0x7f4ec8000ec8) at /usr/include/c++/6/functional:1391
#12 0x000055c66b44afbd in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::operator()() (this=0x7f4ec8000ec8) at /usr/include/c++/6/functional:1380
#13 0x000055c66b44af9c in std::thread::_State_impl<std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)> >::_M_run() (this=0x7f4ec8000ec0) at /usr/include/c++/6/thread:197
#14 0x00007f4f19ecde6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#15 0x00007f4f1b50e4a4 in start_thread (arg=0x7f4ec2ffd700) at pthread_create.c:456
#16 0x00007f4f19642d0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 16 (Thread 0x7f4ec37fe700 (LWP 19657)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x000055c66b4448ef in __gthread_cond_timedwait (__cond=0x55c66ede75d0, __mutex=0x55c66edd7fd0, __abs_timeout=0x7f4ec37fdc00) at /usr/include/x86_64-linux-gnu/c++/6/bits/gthr-default.h:871
#2  0x000055c66b448c3b in std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x55c66ede75d0, __lock=..., __atime=...) at /usr/include/c++/6/condition_variable:166
#3  0x000055c66b447d5b in std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x55c66ede75d0, __lock=..., __atime=...) at /usr/include/c++/6/condition_variable:106
#4  0x000055c66b447449 in std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (this=0x55c66ede75d0, __lock=..., __rtime=...) at /usr/include/c++/6/condition_variable:138
#5  0x000055c66b444ac3 in tpool::thread_pool_generic::wait_for_tasks (this=0x55c66edd7ec0, lk=..., thread_data=0x55c66ede75d0) at /data/src/10.5/tpool/tpool_generic.cc:418
#6  0x000055c66b444cd3 in tpool::thread_pool_generic::get_task (this=0x55c66edd7ec0, thread_var=0x55c66ede75d0, t=0x7f4ec37fdd28) at /data/src/10.5/tpool/tpool_generic.cc:471
#7  0x000055c66b444f60 in tpool::thread_pool_generic::worker_main (this=0x55c66edd7ec0, thread_var=0x55c66ede75d0) at /data/src/10.5/tpool/tpool_generic.cc:516
#8  0x000055c66b44b207 in std::__invoke_impl<void, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(std::__invoke_memfun_deref, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__f=@0x7f4ec8000d58: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55c66b444efc <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:227
#9  0x000055c66b44b179 in std::__invoke<void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__fn=@0x7f4ec8000d58: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55c66b444efc <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:251
#10 0x000055c66b44b10d in std::_Mem_fn_base<void (tpool::thread_pool_generic::*)(tpool::worker_data*), true>::operator()<tpool::thread_pool_generic*, tpool::worker_data*>(tpool::thread_pool_generic*&&, tpool::worker_data*&&) const (this=0x7f4ec8000d58, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:604
#11 0x000055c66b44b0bf in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::_M_invoke<0ul, 1ul>(std::_Index_tuple<0ul, 1ul>) (this=0x7f4ec8000d48) at /usr/include/c++/6/functional:1391
#12 0x000055c66b44afbd in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::operator()() (this=0x7f4ec8000d48) at /usr/include/c++/6/functional:1380
#13 0x000055c66b44af9c in std::thread::_State_impl<std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)> >::_M_run() (this=0x7f4ec8000d40) at /usr/include/c++/6/thread:197
#14 0x00007f4f19ecde6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#15 0x00007f4f1b50e4a4 in start_thread (arg=0x7f4ec37fe700) at pthread_create.c:456
#16 0x00007f4f19642d0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 15 (Thread 0x7f4ec3fff700 (LWP 19656)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x000055c66b4448ef in __gthread_cond_timedwait (__cond=0x55c66ede7650, __mutex=0x55c66edd7fd0, __abs_timeout=0x7f4ec3ffec00) at /usr/include/x86_64-linux-gnu/c++/6/bits/gthr-default.h:871
#2  0x000055c66b448c3b in std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x55c66ede7650, __lock=..., __atime=...) at /usr/include/c++/6/condition_variable:166
#3  0x000055c66b447d5b in std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x55c66ede7650, __lock=..., __atime=...) at /usr/include/c++/6/condition_variable:106
#4  0x000055c66b447449 in std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (this=0x55c66ede7650, __lock=..., __rtime=...) at /usr/include/c++/6/condition_variable:138
#5  0x000055c66b444ac3 in tpool::thread_pool_generic::wait_for_tasks (this=0x55c66edd7ec0, lk=..., thread_data=0x55c66ede7650) at /data/src/10.5/tpool/tpool_generic.cc:418
#6  0x000055c66b444cd3 in tpool::thread_pool_generic::get_task (this=0x55c66edd7ec0, thread_var=0x55c66ede7650, t=0x7f4ec3ffed28) at /data/src/10.5/tpool/tpool_generic.cc:471
#7  0x000055c66b444f60 in tpool::thread_pool_generic::worker_main (this=0x55c66edd7ec0, thread_var=0x55c66ede7650) at /data/src/10.5/tpool/tpool_generic.cc:516
#8  0x000055c66b44b207 in std::__invoke_impl<void, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(std::__invoke_memfun_deref, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__f=@0x7f4ec8000bd8: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55c66b444efc <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:227
#9  0x000055c66b44b179 in std::__invoke<void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__fn=@0x7f4ec8000bd8: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55c66b444efc <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:251
#10 0x000055c66b44b10d in std::_Mem_fn_base<void (tpool::thread_pool_generic::*)(tpool::worker_data*), true>::operator()<tpool::thread_pool_generic*, tpool::worker_data*>(tpool::thread_pool_generic*&&, tpool::worker_data*&&) const (this=0x7f4ec8000bd8, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:604
#11 0x000055c66b44b0bf in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::_M_invoke<0ul, 1ul>(std::_Index_tuple<0ul, 1ul>) (this=0x7f4ec8000bc8) at /usr/include/c++/6/functional:1391
#12 0x000055c66b44afbd in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::operator()() (this=0x7f4ec8000bc8) at /usr/include/c++/6/functional:1380
#13 0x000055c66b44af9c in std::thread::_State_impl<std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)> >::_M_run() (this=0x7f4ec8000bc0) at /usr/include/c++/6/thread:197
#14 0x00007f4f19ecde6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#15 0x00007f4f1b50e4a4 in start_thread (arg=0x7f4ec3fff700) at pthread_create.c:456
#16 0x00007f4f19642d0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 14 (Thread 0x7f4eecff9700 (LWP 19655)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x000055c66b4448ef in __gthread_cond_timedwait (__cond=0x55c66ede76d0, __mutex=0x55c66edd7fd0, __abs_timeout=0x7f4eecff8c00) at /usr/include/x86_64-linux-gnu/c++/6/bits/gthr-default.h:871
#2  0x000055c66b448c3b in std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x55c66ede76d0, __lock=..., __atime=...) at /usr/include/c++/6/condition_variable:166
#3  0x000055c66b447d5b in std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x55c66ede76d0, __lock=..., __atime=...) at /usr/include/c++/6/condition_variable:106
#4  0x000055c66b447449 in std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (this=0x55c66ede76d0, __lock=..., __rtime=...) at /usr/include/c++/6/condition_variable:138
#5  0x000055c66b444ac3 in tpool::thread_pool_generic::wait_for_tasks (this=0x55c66edd7ec0, lk=..., thread_data=0x55c66ede76d0) at /data/src/10.5/tpool/tpool_generic.cc:418
#6  0x000055c66b444cd3 in tpool::thread_pool_generic::get_task (this=0x55c66edd7ec0, thread_var=0x55c66ede76d0, t=0x7f4eecff8d28) at /data/src/10.5/tpool/tpool_generic.cc:471
#7  0x000055c66b444f60 in tpool::thread_pool_generic::worker_main (this=0x55c66edd7ec0, thread_var=0x55c66ede76d0) at /data/src/10.5/tpool/tpool_generic.cc:516
#8  0x000055c66b44b207 in std::__invoke_impl<void, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(std::__invoke_memfun_deref, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__f=@0x7f4ec8000a58: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55c66b444efc <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:227
#9  0x000055c66b44b179 in std::__invoke<void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__fn=@0x7f4ec8000a58: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55c66b444efc <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:251
#10 0x000055c66b44b10d in std::_Mem_fn_base<void (tpool::thread_pool_generic::*)(tpool::worker_data*), true>::operator()<tpool::thread_pool_generic*, tpool::worker_data*>(tpool::thread_pool_generic*&&, tpool::worker_data*&&) const (this=0x7f4ec8000a58, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:604
#11 0x000055c66b44b0bf in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::_M_invoke<0ul, 1ul>(std::_Index_tuple<0ul, 1ul>) (this=0x7f4ec8000a48) at /usr/include/c++/6/functional:1391
#12 0x000055c66b44afbd in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::operator()() (this=0x7f4ec8000a48) at /usr/include/c++/6/functional:1380
#13 0x000055c66b44af9c in std::thread::_State_impl<std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)> >::_M_run() (this=0x7f4ec8000a40) at /usr/include/c++/6/thread:197
#14 0x00007f4f19ecde6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#15 0x00007f4f1b50e4a4 in start_thread (arg=0x7f4eecff9700) at pthread_create.c:456
#16 0x00007f4f19642d0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 13 (Thread 0x7f4eed7fa700 (LWP 19654)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x000055c66b4448ef in __gthread_cond_timedwait (__cond=0x55c66ede7750, __mutex=0x55c66edd7fd0, __abs_timeout=0x7f4eed7f9c00) at /usr/include/x86_64-linux-gnu/c++/6/bits/gthr-default.h:871
#2  0x000055c66b448c3b in std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x55c66ede7750, __lock=..., __atime=...) at /usr/include/c++/6/condition_variable:166
#3  0x000055c66b447d5b in std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x55c66ede7750, __lock=..., __atime=...) at /usr/include/c++/6/condition_variable:106
#4  0x000055c66b447449 in std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (this=0x55c66ede7750, __lock=..., __rtime=...) at /usr/include/c++/6/condition_variable:138
#5  0x000055c66b444ac3 in tpool::thread_pool_generic::wait_for_tasks (this=0x55c66edd7ec0, lk=..., thread_data=0x55c66ede7750) at /data/src/10.5/tpool/tpool_generic.cc:418
#6  0x000055c66b444cd3 in tpool::thread_pool_generic::get_task (this=0x55c66edd7ec0, thread_var=0x55c66ede7750, t=0x7f4eed7f9d28) at /data/src/10.5/tpool/tpool_generic.cc:471
#7  0x000055c66b444f60 in tpool::thread_pool_generic::worker_main (this=0x55c66edd7ec0, thread_var=0x55c66ede7750) at /data/src/10.5/tpool/tpool_generic.cc:516
#8  0x000055c66b44b207 in std::__invoke_impl<void, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(std::__invoke_memfun_deref, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__f=@0x7f4ec80008d8: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55c66b444efc <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:227
#9  0x000055c66b44b179 in std::__invoke<void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__fn=@0x7f4ec80008d8: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55c66b444efc <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:251
#10 0x000055c66b44b10d in std::_Mem_fn_base<void (tpool::thread_pool_generic::*)(tpool::worker_data*), true>::operator()<tpool::thread_pool_generic*, tpool::worker_data*>(tpool::thread_pool_generic*&&, tpool::worker_data*&&) const (this=0x7f4ec80008d8, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:604
#11 0x000055c66b44b0bf in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::_M_invoke<0ul, 1ul>(std::_Index_tuple<0ul, 1ul>) (this=0x7f4ec80008c8) at /usr/include/c++/6/functional:1391
#12 0x000055c66b44afbd in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::operator()() (this=0x7f4ec80008c8) at /usr/include/c++/6/functional:1380
#13 0x000055c66b44af9c in std::thread::_State_impl<std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)> >::_M_run() (this=0x7f4ec80008c0) at /usr/include/c++/6/thread:197
#14 0x00007f4f19ecde6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#15 0x00007f4f1b50e4a4 in start_thread (arg=0x7f4eed7fa700) at pthread_create.c:456
#16 0x00007f4f19642d0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 12 (Thread 0x7f4f180d9700 (LWP 19644)):
#0  0x00007f4f1958df26 in __GI___sigwaitinfo (set=<optimized out>, info=0x7f4f180d8d10) at ../sysdeps/unix/sysv/linux/sigwaitinfo.c:56
#1  0x000055c66a6ebc05 in my_sigwait (set=0x7f4f180d8df0, sig=0x7f4f180d8db4, code=0x7f4f180d8db8) at /data/src/10.5/include/my_pthread.h:196
#2  0x000055c66a6f18ee in signal_hand (arg=0x0) at /data/src/10.5/sql/mysqld.cc:2988
#3  0x000055c66af0dfd8 in pfs_spawn_thread (arg=0x55c66fb12b68) at /data/src/10.5/storage/perfschema/pfs.cc:2201
#4  0x00007f4f1b50e4a4 in start_thread (arg=0x7f4f180d9700) at pthread_create.c:456
#5  0x00007f4f19642d0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 11 (Thread 0x7f4eedffb700 (LWP 19643)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x000055c66b4448ef in __gthread_cond_timedwait (__cond=0x55c66ede77d0, __mutex=0x55c66edd7fd0, __abs_timeout=0x7f4eedffac00) at /usr/include/x86_64-linux-gnu/c++/6/bits/gthr-default.h:871
#2  0x000055c66b448c3b in std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x55c66ede77d0, __lock=..., __atime=...) at /usr/include/c++/6/condition_variable:166
#3  0x000055c66b447d5b in std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x55c66ede77d0, __lock=..., __atime=...) at /usr/include/c++/6/condition_variable:106
#4  0x000055c66b447449 in std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (this=0x55c66ede77d0, __lock=..., __rtime=...) at /usr/include/c++/6/condition_variable:138
#5  0x000055c66b444ac3 in tpool::thread_pool_generic::wait_for_tasks (this=0x55c66edd7ec0, lk=..., thread_data=0x55c66ede77d0) at /data/src/10.5/tpool/tpool_generic.cc:418
#6  0x000055c66b444cd3 in tpool::thread_pool_generic::get_task (this=0x55c66edd7ec0, thread_var=0x55c66ede77d0, t=0x7f4eedffad28) at /data/src/10.5/tpool/tpool_generic.cc:471
#7  0x000055c66b444f60 in tpool::thread_pool_generic::worker_main (this=0x55c66edd7ec0, thread_var=0x55c66ede77d0) at /data/src/10.5/tpool/tpool_generic.cc:516
#8  0x000055c66b44b207 in std::__invoke_impl<void, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(std::__invoke_memfun_deref, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__f=@0x7f4ee8001208: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55c66b444efc <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:227
#9  0x000055c66b44b179 in std::__invoke<void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__fn=@0x7f4ee8001208: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55c66b444efc <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:251
#10 0x000055c66b44b10d in std::_Mem_fn_base<void (tpool::thread_pool_generic::*)(tpool::worker_data*), true>::operator()<tpool::thread_pool_generic*, tpool::worker_data*>(tpool::thread_pool_generic*&&, tpool::worker_data*&&) const (this=0x7f4ee8001208, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:604
#11 0x000055c66b44b0bf in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::_M_invoke<0ul, 1ul>(std::_Index_tuple<0ul, 1ul>) (this=0x7f4ee80011f8) at /usr/include/c++/6/functional:1391
#12 0x000055c66b44afbd in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::operator()() (this=0x7f4ee80011f8) at /usr/include/c++/6/functional:1380
#13 0x000055c66b44af9c in std::thread::_State_impl<std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)> >::_M_run() (this=0x7f4ee80011f0) at /usr/include/c++/6/thread:197
#14 0x00007f4f19ecde6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#15 0x00007f4f1b50e4a4 in start_thread (arg=0x7f4eedffb700) at pthread_create.c:456
#16 0x00007f4f19642d0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 10 (Thread 0x7f4eee7fc700 (LWP 19642)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x000055c66b4448ef in __gthread_cond_timedwait (__cond=0x55c66ede7850, __mutex=0x55c66edd7fd0, __abs_timeout=0x7f4eee7fbc00) at /usr/include/x86_64-linux-gnu/c++/6/bits/gthr-default.h:871
#2  0x000055c66b448c3b in std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x55c66ede7850, __lock=..., __atime=...) at /usr/include/c++/6/condition_variable:166
#3  0x000055c66b447d5b in std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x55c66ede7850, __lock=..., __atime=...) at /usr/include/c++/6/condition_variable:106
#4  0x000055c66b447449 in std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (this=0x55c66ede7850, __lock=..., __rtime=...) at /usr/include/c++/6/condition_variable:138
#5  0x000055c66b444ac3 in tpool::thread_pool_generic::wait_for_tasks (this=0x55c66edd7ec0, lk=..., thread_data=0x55c66ede7850) at /data/src/10.5/tpool/tpool_generic.cc:418
#6  0x000055c66b444cd3 in tpool::thread_pool_generic::get_task (this=0x55c66edd7ec0, thread_var=0x55c66ede7850, t=0x7f4eee7fbd28) at /data/src/10.5/tpool/tpool_generic.cc:471
#7  0x000055c66b444f60 in tpool::thread_pool_generic::worker_main (this=0x55c66edd7ec0, thread_var=0x55c66ede7850) at /data/src/10.5/tpool/tpool_generic.cc:516
#8  0x000055c66b44b207 in std::__invoke_impl<void, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(std::__invoke_memfun_deref, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__f=@0x7f4ee8001088: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55c66b444efc <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:227
#9  0x000055c66b44b179 in std::__invoke<void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__fn=@0x7f4ee8001088: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55c66b444efc <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:251
#10 0x000055c66b44b10d in std::_Mem_fn_base<void (tpool::thread_pool_generic::*)(tpool::worker_data*), true>::operator()<tpool::thread_pool_generic*, tpool::worker_data*>(tpool::thread_pool_generic*&&, tpool::worker_data*&&) const (this=0x7f4ee8001088, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:604
#11 0x000055c66b44b0bf in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::_M_invoke<0ul, 1ul>(std::_Index_tuple<0ul, 1ul>) (this=0x7f4ee8001078) at /usr/include/c++/6/functional:1391
#12 0x000055c66b44afbd in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::operator()() (this=0x7f4ee8001078) at /usr/include/c++/6/functional:1380
#13 0x000055c66b44af9c in std::thread::_State_impl<std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)> >::_M_run() (this=0x7f4ee8001070) at /usr/include/c++/6/thread:197
#14 0x00007f4f19ecde6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#15 0x00007f4f1b50e4a4 in start_thread (arg=0x7f4eee7fc700) at pthread_create.c:456
#16 0x00007f4f19642d0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 9 (Thread 0x7f4eeeffd700 (LWP 19641)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x000055c66b4448ef in __gthread_cond_timedwait (__cond=0x55c66ede78d0, __mutex=0x55c66edd7fd0, __abs_timeout=0x7f4eeeffcc00) at /usr/include/x86_64-linux-gnu/c++/6/bits/gthr-default.h:871
#2  0x000055c66b448c3b in std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x55c66ede78d0, __lock=..., __atime=...) at /usr/include/c++/6/condition_variable:166
#3  0x000055c66b447d5b in std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x55c66ede78d0, __lock=..., __atime=...) at /usr/include/c++/6/condition_variable:106
#4  0x000055c66b447449 in std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (this=0x55c66ede78d0, __lock=..., __rtime=...) at /usr/include/c++/6/condition_variable:138
#5  0x000055c66b444ac3 in tpool::thread_pool_generic::wait_for_tasks (this=0x55c66edd7ec0, lk=..., thread_data=0x55c66ede78d0) at /data/src/10.5/tpool/tpool_generic.cc:418
#6  0x000055c66b444cd3 in tpool::thread_pool_generic::get_task (this=0x55c66edd7ec0, thread_var=0x55c66ede78d0, t=0x7f4eeeffcd28) at /data/src/10.5/tpool/tpool_generic.cc:471
#7  0x000055c66b444f60 in tpool::thread_pool_generic::worker_main (this=0x55c66edd7ec0, thread_var=0x55c66ede78d0) at /data/src/10.5/tpool/tpool_generic.cc:516
#8  0x000055c66b44b207 in std::__invoke_impl<void, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(std::__invoke_memfun_deref, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__f=@0x7f4ee8000bf8: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55c66b444efc <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:227
#9  0x000055c66b44b179 in std::__invoke<void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__fn=@0x7f4ee8000bf8: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55c66b444efc <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:251
#10 0x000055c66b44b10d in std::_Mem_fn_base<void (tpool::thread_pool_generic::*)(tpool::worker_data*), true>::operator()<tpool::thread_pool_generic*, tpool::worker_data*>(tpool::thread_pool_generic*&&, tpool::worker_data*&&) const (this=0x7f4ee8000bf8, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:604
#11 0x000055c66b44b0bf in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::_M_invoke<0ul, 1ul>(std::_Index_tuple<0ul, 1ul>) (this=0x7f4ee8000be8) at /usr/include/c++/6/functional:1391
#12 0x000055c66b44afbd in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::operator()() (this=0x7f4ee8000be8) at /usr/include/c++/6/functional:1380
#13 0x000055c66b44af9c in std::thread::_State_impl<std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)> >::_M_run() (this=0x7f4ee8000be0) at /usr/include/c++/6/thread:197
#14 0x00007f4f19ecde6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#15 0x00007f4f1b50e4a4 in start_thread (arg=0x7f4eeeffd700) at pthread_create.c:456
#16 0x00007f4f19642d0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 8 (Thread 0x7f4ef4ffd700 (LWP 19640)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x000055c66b4448ef in __gthread_cond_timedwait (__cond=0x55c66ede7950, __mutex=0x55c66edd7fd0, __abs_timeout=0x7f4ef4ffcc00) at /usr/include/x86_64-linux-gnu/c++/6/bits/gthr-default.h:871
#2  0x000055c66b448c3b in std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x55c66ede7950, __lock=..., __atime=...) at /usr/include/c++/6/condition_variable:166
#3  0x000055c66b447d5b in std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x55c66ede7950, __lock=..., __atime=...) at /usr/include/c++/6/condition_variable:106
#4  0x000055c66b447449 in std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (this=0x55c66ede7950, __lock=..., __rtime=...) at /usr/include/c++/6/condition_variable:138
#5  0x000055c66b444ac3 in tpool::thread_pool_generic::wait_for_tasks (this=0x55c66edd7ec0, lk=..., thread_data=0x55c66ede7950) at /data/src/10.5/tpool/tpool_generic.cc:418
#6  0x000055c66b444cd3 in tpool::thread_pool_generic::get_task (this=0x55c66edd7ec0, thread_var=0x55c66ede7950, t=0x7f4ef4ffcd28) at /data/src/10.5/tpool/tpool_generic.cc:471
#7  0x000055c66b444f60 in tpool::thread_pool_generic::worker_main (this=0x55c66edd7ec0, thread_var=0x55c66ede7950) at /data/src/10.5/tpool/tpool_generic.cc:516
#8  0x000055c66b44b207 in std::__invoke_impl<void, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(std::__invoke_memfun_deref, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__f=@0x55c66fa60b48: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55c66b444efc <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:227
#9  0x000055c66b44b179 in std::__invoke<void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__fn=@0x55c66fa60b48: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55c66b444efc <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:251
#10 0x000055c66b44b10d in std::_Mem_fn_base<void (tpool::thread_pool_generic::*)(tpool::worker_data*), true>::operator()<tpool::thread_pool_generic*, tpool::worker_data*>(tpool::thread_pool_generic*&&, tpool::worker_data*&&) const (this=0x55c66fa60b48, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:604
#11 0x000055c66b44b0bf in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::_M_invoke<0ul, 1ul>(std::_Index_tuple<0ul, 1ul>) (this=0x55c66fa60b38) at /usr/include/c++/6/functional:1391
#12 0x000055c66b44afbd in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::operator()() (this=0x55c66fa60b38) at /usr/include/c++/6/functional:1380
#13 0x000055c66b44af9c in std::thread::_State_impl<std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)> >::_M_run() (this=0x55c66fa60b30) at /usr/include/c++/6/thread:197
#14 0x00007f4f19ecde6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#15 0x00007f4f1b50e4a4 in start_thread (arg=0x7f4ef4ffd700) at pthread_create.c:456
#16 0x00007f4f19642d0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 7 (Thread 0x7f4eef7fe700 (LWP 19639)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x000055c66b4448ef in __gthread_cond_timedwait (__cond=0x55c66ede79d0, __mutex=0x55c66edd7fd0, __abs_timeout=0x7f4eef7fdc00) at /usr/include/x86_64-linux-gnu/c++/6/bits/gthr-default.h:871
#2  0x000055c66b448c3b in std::condition_variable::__wait_until_impl<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x55c66ede79d0, __lock=..., __atime=...) at /usr/include/c++/6/condition_variable:166
#3  0x000055c66b447d5b in std::condition_variable::wait_until<std::chrono::duration<long, std::ratio<1l, 1000000000l> > > (this=0x55c66ede79d0, __lock=..., __atime=...) at /usr/include/c++/6/condition_variable:106
#4  0x000055c66b447449 in std::condition_variable::wait_for<long, std::ratio<1l, 1000l> > (this=0x55c66ede79d0, __lock=..., __rtime=...) at /usr/include/c++/6/condition_variable:138
#5  0x000055c66b444ac3 in tpool::thread_pool_generic::wait_for_tasks (this=0x55c66edd7ec0, lk=..., thread_data=0x55c66ede79d0) at /data/src/10.5/tpool/tpool_generic.cc:418
#6  0x000055c66b444cd3 in tpool::thread_pool_generic::get_task (this=0x55c66edd7ec0, thread_var=0x55c66ede79d0, t=0x7f4eef7fdd28) at /data/src/10.5/tpool/tpool_generic.cc:471
#7  0x000055c66b444f60 in tpool::thread_pool_generic::worker_main (this=0x55c66edd7ec0, thread_var=0x55c66ede79d0) at /data/src/10.5/tpool/tpool_generic.cc:516
#8  0x000055c66b44b207 in std::__invoke_impl<void, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(std::__invoke_memfun_deref, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__f=@0x7f4f14000c28: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55c66b444efc <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:227
#9  0x000055c66b44b179 in std::__invoke<void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__fn=@0x7f4f14000c28: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55c66b444efc <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:251
#10 0x000055c66b44b10d in std::_Mem_fn_base<void (tpool::thread_pool_generic::*)(tpool::worker_data*), true>::operator()<tpool::thread_pool_generic*, tpool::worker_data*>(tpool::thread_pool_generic*&&, tpool::worker_data*&&) const (this=0x7f4f14000c28, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:604
#11 0x000055c66b44b0bf in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::_M_invoke<0ul, 1ul>(std::_Index_tuple<0ul, 1ul>) (this=0x7f4f14000c18) at /usr/include/c++/6/functional:1391
#12 0x000055c66b44afbd in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::operator()() (this=0x7f4f14000c18) at /usr/include/c++/6/functional:1380
#13 0x000055c66b44af9c in std::thread::_State_impl<std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)> >::_M_run() (this=0x7f4f14000c10) at /usr/include/c++/6/thread:197
#14 0x00007f4f19ecde6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#15 0x00007f4f1b50e4a4 in start_thread (arg=0x7f4eef7fe700) at pthread_create.c:456
#16 0x00007f4f19642d0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 6 (Thread 0x7f4eeffff700 (LWP 19638)):
#0  hash_get_nth_cell (table=0x55c66f975ca8, n=14926) at /data/src/10.5/storage/innobase/include/hash0hash.ic:38
#1  0x000055c66b352604 in dict_table_check_if_in_cache_low (table_name=0x55c66ba1b5bb "mysql/innodb_table_stats") at /data/src/10.5/storage/innobase/include/dict0priv.ic:87
#2  0x000055c66b352200 in dict_table_get_low (table_name=0x55c66ba1b5bb "mysql/innodb_table_stats") at /data/src/10.5/storage/innobase/include/dict0priv.ic:44
#3  0x000055c66b35ffde in dict_table_schema_check (req_schema=0x7f4eefffdb40, errstr=0x7f4eefffdee0 "\200", errstr_sz=512) at /data/src/10.5/storage/innobase/dict/dict0dict.cc:4619
#4  0x000055c66b3836c4 in dict_stats_persistent_storage_check (caller_has_dict_sys_mutex=true) at /data/src/10.5/storage/innobase/dict/dict0stats.cc:246
#5  0x000055c66b3837fe in dict_stats_exec_sql (pinfo=0x7f4ee800b2d8, sql=0x55c66ba1cdf0 "PROCEDURE DELETE_FROM_INDEX_STATS () IS\nBEGIN\nDELETE FROM \"mysql/innodb_index_stats\" WHERE\ndatabase_name = :database_name AND\ntable_name = :table_name;\nEND;\n", trx=0x0) at /data/src/10.5/storage/innobase/dict/dict0stats.cc:289
#6  0x000055c66b38b15f in dict_stats_delete_from_index_stats (database_name=0x7f4eefffe1b0 "test", table_name=0x7f4eefffe280 "#mysql50##sql-ib20") at /data/src/10.5/storage/innobase/dict/dict0stats.cc:3494
#7  0x000055c66b38b272 in dict_stats_drop_table (db_and_table=0x7f4ee8000b88 "test/#sql-ib20", errstr=0x7f4eefffe760 "\200\347\377\357N\177", errstr_sz=1024) at /data/src/10.5/storage/innobase/dict/dict0stats.cc:3538
#8  0x000055c66b1a9698 in row_drop_table_for_mysql (name=0x7f4ee8000b88 "test/#sql-ib20", trx=0x7f4f180db1e8, sqlcom=SQLCOM_TRUNCATE, create_failed=false, nonatomic=true) at /data/src/10.5/storage/innobase/row/row0mysql.cc:3427
#9  0x000055c66b1a7527 in row_drop_table_for_mysql_in_background (name=0x7f4ee8000b88 "test/#sql-ib20") at /data/src/10.5/storage/innobase/row/row0mysql.cc:2608
#10 0x000055c66b1a7823 in row_drop_tables_for_mysql_in_background () at /data/src/10.5/storage/innobase/row/row0mysql.cc:2677
#11 0x000055c66b214def in srv_master_do_active_tasks () at /data/src/10.5/storage/innobase/srv/srv0srv.cc:1812
#12 0x000055c66b21579f in srv_master_callback () at /data/src/10.5/storage/innobase/srv/srv0srv.cc:2000
#13 0x000055c66b4467a4 in tpool::thread_pool_generic::timer_generic::run (this=0x55c66faa9d50) at /data/src/10.5/tpool/tpool_generic.cc:299
#14 0x000055c66b446892 in tpool::thread_pool_generic::timer_generic::execute (arg=0x55c66faa9d50) at /data/src/10.5/tpool/tpool_generic.cc:317
#15 0x000055c66b44b7c3 in tpool::task::execute (this=0x55c66faa9d90) at /data/src/10.5/tpool/task.cc:52
#16 0x000055c66b444f94 in tpool::thread_pool_generic::worker_main (this=0x55c66edd7ec0, thread_var=0x55c66ede7a50) at /data/src/10.5/tpool/tpool_generic.cc:518
#17 0x000055c66b44b207 in std::__invoke_impl<void, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(std::__invoke_memfun_deref, void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__f=@0x7f4f14000aa8: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55c66b444efc <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __t=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:227
#18 0x000055c66b44b179 in std::__invoke<void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*, tpool::worker_data*>(void (tpool::thread_pool_generic::* const&)(tpool::worker_data*), tpool::thread_pool_generic*&&, tpool::worker_data*&&) (__fn=@0x7f4f14000aa8: (void (tpool::thread_pool_generic::*)(tpool::thread_pool_generic * const, tpool::worker_data *)) 0x55c66b444efc <tpool::thread_pool_generic::worker_main(tpool::worker_data*)>, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:251
#19 0x000055c66b44b10d in std::_Mem_fn_base<void (tpool::thread_pool_generic::*)(tpool::worker_data*), true>::operator()<tpool::thread_pool_generic*, tpool::worker_data*>(tpool::thread_pool_generic*&&, tpool::worker_data*&&) const (this=0x7f4f14000aa8, __args#0=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x8083363>, __args#1=<unknown type in /data/bld/10.5-debug-nightly/bin/mariadbd, CU 0x8071beb, DIE 0x808336f>) at /usr/include/c++/6/functional:604
#20 0x000055c66b44b0bf in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::_M_invoke<0ul, 1ul>(std::_Index_tuple<0ul, 1ul>) (this=0x7f4f14000a98) at /usr/include/c++/6/functional:1391
#21 0x000055c66b44afbd in std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)>::operator()() (this=0x7f4f14000a98) at /usr/include/c++/6/functional:1380
#22 0x000055c66b44af9c in std::thread::_State_impl<std::_Bind_simple<std::_Mem_fn<void (tpool::thread_pool_generic::*)(tpool::worker_data*)> (tpool::thread_pool_generic*, tpool::worker_data*)> >::_M_run() (this=0x7f4f14000a90) at /usr/include/c++/6/thread:197
#23 0x00007f4f19ecde6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#24 0x00007f4f1b50e4a4 in start_thread (arg=0x7f4eeffff700) at pthread_create.c:456
#25 0x00007f4f19642d0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 5 (Thread 0x7f4ef57fe700 (LWP 19636)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x000055c66b0f77ae in os_event::timed_wait (this=0x55c66edfc658, abstime=0x7f4ef57fdbf0) at /data/src/10.5/storage/innobase/os/os0event.cc:275
#2  0x000055c66b0f7a6a in os_event::wait_time_low (this=0x55c66edfc658, time_in_usec=1000000, reset_sig_count=2) at /data/src/10.5/storage/innobase/os/os0event.cc:385
#3  0x000055c66b0f7c3c in os_event_wait_time_low (event=0x55c66edfc658, time_in_usec=1000000, reset_sig_count=2) at /data/src/10.5/storage/innobase/os/os0event.cc:485
#4  0x000055c66b32975d in pc_sleep_if_needed (next_loop_time=2328978547, sig_count=2, cur_time=2328977547) at /data/src/10.5/storage/innobase/buf/buf0flu.cc:2552
#5  0x000055c66b32a459 in buf_flush_page_cleaner () at /data/src/10.5/storage/innobase/buf/buf0flu.cc:2841
#6  0x00007f4f1b50e4a4 in start_thread (arg=0x7f4ef57fe700) at pthread_create.c:456
#7  0x00007f4f19642d0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 4 (Thread 0x7f4efffff700 (LWP 19635)):
#0  0x00007f4f1aec56ca in ?? () from /lib/x86_64-linux-gnu/libaio.so.1
#1  0x000055c66b44be49 in tpool::aio_linux::getevent_thread_routine (aio=0x55c66edd1490) at /data/src/10.5/tpool/aio_linux.cc:53
#2  0x000055c66b44c792 in std::_Bind_simple<void (*(tpool::aio_linux*))(tpool::aio_linux*)>::_M_invoke<0ul>(std::_Index_tuple<0ul>) (this=0x55c66edd1c68) at /usr/include/c++/6/functional:1391
#3  0x000055c66b44c6e3 in std::_Bind_simple<void (*(tpool::aio_linux*))(tpool::aio_linux*)>::operator()() (this=0x55c66edd1c68) at /usr/include/c++/6/functional:1380
#4  0x000055c66b44c6c2 in std::thread::_State_impl<std::_Bind_simple<void (*(tpool::aio_linux*))(tpool::aio_linux*)> >::_M_run() (this=0x55c66edd1c60) at /usr/include/c++/6/thread:197
#5  0x00007f4f19ecde6f in ?? () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#6  0x00007f4f1b50e4a4 in start_thread (arg=0x7f4efffff700) at pthread_create.c:456
#7  0x00007f4f19642d0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 3 (Thread 0x7f4f18cdb700 (LWP 19634)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x000055c66b4ee9df in safe_cond_timedwait (cond=0x55c66cbe6ee0 <COND_checkpoint>, mp=0x55c66cbe6e20 <LOCK_checkpoint>, abstime=0x7f4f18cdae10, file=0x55c66b860c10 "/data/src/10.5/include/mysql/psi/mysql_thread.h", line=1268) at /data/src/10.5/mysys/thr_mutex.c:546
#2  0x000055c66ae5fe5c in inline_mysql_cond_timedwait (that=0x55c66cbe6ee0 <COND_checkpoint>, mutex=0x55c66cbe6e20 <LOCK_checkpoint>, abstime=0x7f4f18cdae10, src_file=0x55c66b860c40 "/data/src/10.5/storage/maria/ma_servicethread.c", src_line=116) at /data/src/10.5/include/mysql/psi/mysql_thread.h:1268
#3  0x000055c66ae60349 in my_service_thread_sleep (control=0x55c66c1d7140 <checkpoint_control>, sleep_time=30000000000) at /data/src/10.5/storage/maria/ma_servicethread.c:115
#4  0x000055c66ae54057 in ma_checkpoint_background (arg=0x1e) at /data/src/10.5/storage/maria/ma_checkpoint.c:707
#5  0x00007f4f1b50e4a4 in start_thread (arg=0x7f4f18cdb700) at pthread_create.c:456
#6  0x00007f4f19642d0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 2 (Thread 0x7f4f1b946700 (LWP 19633)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
#1  0x000055c66b4ee9df in safe_cond_timedwait (cond=0x55c66cc91e00 <COND_timer>, mp=0x55c66cc91d40 <LOCK_timer>, abstime=0x7f4f1b945ec0, file=0x55c66ba72900 "/data/src/10.5/include/mysql/psi/mysql_thread.h", line=1268) at /data/src/10.5/mysys/thr_mutex.c:546
#2  0x000055c66b4efa87 in inline_mysql_cond_timedwait (that=0x55c66cc91e00 <COND_timer>, mutex=0x55c66cc91d40 <LOCK_timer>, abstime=0x7f4f1b945ec0, src_file=0x55c66ba72930 "/data/src/10.5/mysys/thr_timer.c", src_line=321) at /data/src/10.5/include/mysql/psi/mysql_thread.h:1268
#3  0x000055c66b4f0708 in timer_handler (arg=0x0) at /data/src/10.5/mysys/thr_timer.c:321
#4  0x00007f4f1b50e4a4 in start_thread (arg=0x7f4f1b946700) at pthread_create.c:456
#5  0x00007f4f19642d0f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:97

Thread 1 (Thread 0x7f4f1b924f40 (LWP 19631)):
#0  0x00007f4f1962beb7 in sched_yield () at ../sysdeps/unix/syscall-template.S:84
#1  0x000055c66b0f8278 in os_thread_yield () at /data/src/10.5/storage/innobase/os/os0thread.cc:212
#2  0x000055c66b21f461 in srv_shutdown_bg_undo_sources () at /data/src/10.5/storage/innobase/srv/srv0start.cc:2048
#3  0x000055c66b21f4d8 in innodb_preshutdown () at /data/src/10.5/storage/innobase/srv/srv0start.cc:2070
#4  0x000055c66ab90a74 in plugin_pre_shutdown (plugin=0x55c66fb055a8) at /data/src/10.5/sql/handler.cc:920
#5  0x000055c66a857d62 in plugin_foreach_with_mask (thd=0x0, func=0x55c66ab90a33 <plugin_pre_shutdown(THD*, plugin_ref, void*)>, type=1, state_mask=10, arg=0x0) at /data/src/10.5/sql/sql_plugin.cc:2470
#6  0x000055c66ab90aa0 in ha_pre_shutdown () at /data/src/10.5/sql/handler.cc:929
#7  0x000055c66a6f70ce in mysqld_main (argc=12, argv=0x55c66ec9d258) at /data/src/10.5/sql/mysqld.cc:5647
#8  0x000055c66a6ebb50 in main (argc=11, argv=0x7ffd7bfa88b8) at /data/src/10.5/sql/main.cc:25