CURRENT_TEST: main.greedy_optimizer
mysqltest got signal 6
read_command_buf (0x631000014818): }

conn->name (0x603000001168): 

Attempting backtrace...
stack_bottom = 0x0 thread_stack 0x3c000
/lib/x86_64-linux-gnu/libasan.so.5(+0x6cd30)[0x7fb0aa69cd30]
mysys/stacktrace.c:215(my_print_stacktrace)[0x55ee40cb4052]
client/mysqltest.cc:10086(dump_backtrace())[0x55ee40b72821]
client/mysqltest.cc:10102(signal_handler)[0x55ee40b72985]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x153c0)[0x7fb0aa6223c0]
/lib/x86_64-linux-gnu/libc.so.6(__poll+0x17)[0x7fb0a97e9ac7]
/lib/x86_64-linux-gnu/libasan.so.5(poll+0xaa)[0x7fb0aa66c5ba]
pvio/pvio_socket.c:532(pvio_socket_wait_io_or_timeout)[0x55ee40c5af83]
pvio/pvio_socket.c:318(pvio_socket_read)[0x55ee40c5b136]
libmariadb/ma_pvio.c:255(ma_pvio_read)[0x55ee40beb0ab]
libmariadb/ma_pvio.c:299(ma_pvio_cache_read)[0x55ee40beb631]
libmariadb/ma_net.c:385(ma_real_read)[0x55ee40c66259]
libmariadb/ma_net.c:439(ma_net_read)[0x55ee40c68988]
libmariadb/mariadb_lib.c:215(ma_net_safe_read)[0x55ee40bd5f5e]
libmariadb/mariadb_lib.c:2869(mthd_my_read_query_result)[0x55ee40be7347]
libmariadb/mariadb_lib.c:2958(mysql_read_query_result)[0x55ee40bbec53]
tests/nonblock-wrappers.h:324(wrap_mysql_read_query_result(st_mysql*))[0x55ee40b7444d]
client/mysqltest.cc:8393(run_query_normal(st_connection*, st_command*, int, char const*, unsigned long, st_dynamic_string*, st_dynamic_string*))[0x55ee40ba80f8]
client/mysqltest.cc:9748(run_query(st_connection*, st_command*, int))[0x55ee40baa040]
client/mysqltest.cc:10583(main)[0x55ee40bacf53]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf3)[0x7fb0a96fb0b3]
/home/buildbot/buildbot/build/mariadb-12.1.0/client//mariadb-test(_start+0x2e)[0x55ee40b7154e]
Writing a core file...
CURRENT_TEST: main.greedy_optimizer
mysqltest got signal 6
read_command_buf (0x631000014818): }

conn->name (0x603000001168): 

Attempting backtrace...
stack_bottom = 0x0 thread_stack 0x3c000
/lib/x86_64-linux-gnu/libasan.so.5(+0x6cd30)[0x7fddaedd6d30]
mysys/stacktrace.c:215(my_print_stacktrace)[0x562e59c5c052]
client/mysqltest.cc:10086(dump_backtrace())[0x562e59b1a821]
client/mysqltest.cc:10102(signal_handler)[0x562e59b1a985]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x153c0)[0x7fddaed5c3c0]
/lib/x86_64-linux-gnu/libc.so.6(__poll+0x17)[0x7fddadf23ac7]
/lib/x86_64-linux-gnu/libasan.so.5(poll+0xaa)[0x7fddaeda65ba]
pvio/pvio_socket.c:532(pvio_socket_wait_io_or_timeout)[0x562e59c02f83]
pvio/pvio_socket.c:318(pvio_socket_read)[0x562e59c03136]
libmariadb/ma_pvio.c:255(ma_pvio_read)[0x562e59b930ab]
libmariadb/ma_pvio.c:299(ma_pvio_cache_read)[0x562e59b93631]
libmariadb/ma_net.c:385(ma_real_read)[0x562e59c0e259]
libmariadb/ma_net.c:439(ma_net_read)[0x562e59c10988]
libmariadb/mariadb_lib.c:215(ma_net_safe_read)[0x562e59b7df5e]
libmariadb/mariadb_lib.c:2869(mthd_my_read_query_result)[0x562e59b8f347]
libmariadb/mariadb_lib.c:2958(mysql_read_query_result)[0x562e59b66c53]
tests/nonblock-wrappers.h:324(wrap_mysql_read_query_result(st_mysql*))[0x562e59b1c44d]
client/mysqltest.cc:8393(run_query_normal(st_connection*, st_command*, int, char const*, unsigned long, st_dynamic_string*, st_dynamic_string*))[0x562e59b500f8]
client/mysqltest.cc:9748(run_query(st_connection*, st_command*, int))[0x562e59b52040]
client/mysqltest.cc:10583(main)[0x562e59b54f53]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf3)[0x7fddade350b3]
/home/buildbot/buildbot/build/mariadb-12.1.0/client//mariadb-test(_start+0x2e)[0x562e59b1954e]
Writing a core file...
