Assertion `(longlong) thd->status_var.memory_used >= 0' fails in my_malloc_size_cb_func on second post of feedback report

2015-11-05 18:48:56 139805530781440 [Note] feedback plugin: report to 'https://mariadb.org/feedback_plugin/post' was sent

2015-11-05 18:48:56 139805530781440 [Note] feedback plugin: server replied 'ok'

2015-11-05 18:50:57 139805530781440 [Note] feedback plugin: report to 'https://mariadb.org/feedback_plugin/post' was sent

2015-11-05 18:51:02 139805530781440 [Note] feedback plugin: server replied 'ok'

mysqld: /home/elenst/git/10.1-bug/sql/mysqld.cc:4018: void my_malloc_size_cb_func(long long int, my_bool): Assertion `(longlong) thd->status_var.local_memory

_used >= 0' failed.

151105 18:51:02 [ERROR] mysqld got signal 6 ;

#7  0x00007f272ec25192 in __assert_fail () from /lib/x86_64-linux-gnu/libc.so.6

#8  0x00007f27310d7064 in my_malloc_size_cb_func (size=-256, is_thread_specific=1 '\001') at sql/mysqld.cc:4018

#9  0x00007f2731a2516f in update_malloc_size (size=-256, is_thread_specific=1 '\001') at mysys/my_malloc.c:67

#10 0x00007f2731a25687 in my_free (ptr=0x7f270200e970) at mysys/my_malloc.c:215

#11 0x00007f27319fd4d7 in delete_dynamic (array=0x7f27020fa6a0) at mysys/array.c:302

#12 0x00007f2731a02c2d in my_hash_free (hash=0x7f27020fa678) at mysys/hash.c:146

#13 0x00007f27311601b4 in THD::cleanup (this=0x7f27020fa070) at sql/sql_class.cc:1612

#14 0x00007f2731160433 in THD::~THD (this=0x7f27020fa070, __in_chrg=<optimised out>) at sql/sql_class.cc:1656

#15 0x00007f2731160892 in THD::~THD (this=0x7f27020fa070, __in_chrg=<optimised out>) at sql/sql_class.cc:1708

#16 0x00007f27319e5ff0 in feedback::send_report (when=0x0) at plugin/feedback/sender_thread.cc:268

#17 0x00007f27319e6108 in feedback::background_thread (arg=0x0) at plugin/feedback/sender_thread.cc:291

#18 0x00007f272f5bce9a in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0

#19 0x00007f272ece9cbd in clone () from /lib/x86_64-linux-gnu/libc.so.6