HS: Assertion `prev == 0 && next == 0' failed in ilink::assert_not_linked

--plugin-load-add=handlersocket=handlersocket.so

--plugin-maturity=unknown

--loose-handlersocket-address=127.0.0.1

--loose-handlersocket-port=9968

--loose-handlersocket-port-wr=9969

# HandlerSocket worker THD teardown assertion (debug builds).

# The plugin is loaded at startup (hs.opt) with a bound port, so its worker threads

# are up and each has registered a bare THD via server_threads.insert(thd) before the

# test runs. UNINSTALL tears the workers down: term_thread

# (plugin/handler_socket/handlersocket/database.cpp:336) deletes each THD without

# removing it from server_threads, so THD::~THD trips ilink::assert_not_linked and the

# server aborts. Debug-build only.

if (`SELECT LENGTH('$HANDLERSOCKET_SO') = 0`) {

  skip handlersocket plugin is not built;

}

--disable_query_log

call mtr.add_suppression("handlersocket: open_files_limit is too small");

call mtr.add_suppression("Plugin 'handlersocket' is of maturity level beta");

--enable_query_log

UNINSTALL PLUGIN handlersocket;

./mtr hs

mariadbd: /test/13.0_dbg/sql/sql_list.h:717: void ilink::assert_not_linked(): Assertion `prev == 0 && next == 0' failed.

Core was generated by `/test/MD210526-mariadb-13.0.1-linux-x86_64-dbg/bin/mariadbd --defaults-group-su'.

Program terminated with signal SIGABRT, Aborted.

#0  __pthread_kill_implementation (no_tid=0, signo=6, threadid=<optimized out>)at ./nptl/pthread_kill.c:44

[Current thread is 1 (LWP 95415)]

(gdb) bt

#0  __pthread_kill_implementation (no_tid=0, signo=6, threadid=<optimized out>)at ./nptl/pthread_kill.c:44

#1  __pthread_kill_internal (signo=6, threadid=<optimized out>)at ./nptl/pthread_kill.c:78

#2  __GI___pthread_kill (threadid=<optimized out>, signo=signo@entry=6)at ./nptl/pthread_kill.c:89

#3  0x00007592b1a4526e in __GI_raise (sig=sig@entry=6)at ../sysdeps/posix/raise.c:26

#4  0x00007592b1a288ff in __GI_abort () at ./stdlib/abort.c:79

#5  0x00007592b1a2881b in __assert_fail_base (fmt=0x7592b1bd01e8 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion@entry=0x5ce14d7c0a2f "prev == 0 && next == 0", file=file@entry=0x5ce14d859626 "/test/13.0_dbg/sql/sql_list.h", line=line@entry=717, function=function@entry=0x5ce14d7e37cc "void ilink::assert_not_linked()")at ./assert/assert.c:94

#6  0x00007592b1a3b507 in __assert_fail (assertion=0x5ce14d7c0a2f "prev == 0 && next == 0", file=0x5ce14d859626 "/test/13.0_dbg/sql/sql_list.h", line=717, function=0x5ce14d7e37cc "void ilink::assert_not_linked()")at ./assert/assert.c:103

#7  0x00005ce14e2f60b7 in ilink::assert_not_linked (this=0x759244000d58)at /test/13.0_dbg/sql/sql_list.h:717

#8  0x00005ce14e390a81 in THD::~THD (this=0x759244000d58)at /test/13.0_dbg/sql/sql_class.cc:1873

#9  0x00005ce14e391189 in THD::~THD (this=0x759244000d58)at /test/13.0_dbg/sql/sql_class.cc:1868

#10 0x00007592b0d177af in dena::dbcontext::term_thread (this=0x5ce150c7e1c0)at /test/13.0_dbg/plugin/handler_socket/handlersocket/database.cpp:336

#11 0x00007592b0d353c4 in dena::(anonymous namespace)::thr_init::~thr_init (this=0x759295fffba8)at /test/13.0_dbg/plugin/handler_socket/handlersocket/hstcpsvr_worker.cpp:317

#12 0x00007592b0d33826 in dena::hstcpsvr_worker::run (this=0x5ce150c7e100)at /test/13.0_dbg/plugin/handler_socket/handlersocket/hstcpsvr_worker.cpp:347

#13 0x00007592b0d4073e in dena::worker_throbj::operator() (this=0x5ce150c7e0d0)at /test/13.0_dbg/plugin/handler_socket/handlersocket/hstcpsvr.cpp:30

#14 0x00007592b0d4070d in dena::thread<dena::worker_throbj>::thread_main (arg=0x5ce150c7e0d0) at libhsclient/thread.hpp:71

#15 0x00007592b1a9ca94 in start_thread (arg=<optimized out>)at ./nptl/pthread_create.c:447

#16 0x00007592b1b29c3c in clone3 ()at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78