Pointer being freed was not allocated, server crashes, binlog_encryption.rpl_ssl fails in buildbot on labrador

binlog_encryption.rpl_ssl 'row'          [ fail ]

        Test ended at 2016-12-11 19:10:13

CURRENT_TEST: binlog_encryption.rpl_ssl

Server [mysqld.1 - pid: 75912, winpid: 75912, exit: 256] failed during test run

Server log from this test:

----------SERVER LOG START-----------

mysqld(75913,0x112963000) malloc: *** error for object 0x7fd231543030: pointer being freed was not allocated

*** set a breakpoint in malloc_error_break to debug

161211 19:10:11 [ERROR] mysqld got signal 6 ;

This could be because you hit a bug. It is also possible that this binary

or one of the libraries it was linked against is corrupt, improperly built,

or misconfigured. This error can also be caused by malfunctioning hardware.

To report this bug, see https://mariadb.com/kb/en/reporting-bugs

We will try our best to scrape up some info that will hopefully help

diagnose the problem, but since we have already crashed, 

something is definitely wrong and this may fail.

Server version: 10.1.20-MariaDB

key_buffer_size=1048576

read_buffer_size=131072

max_used_connections=7

max_threads=153

thread_count=7

It is possible that mysqld could use up to 

key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 62897 K  bytes of memory

Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0x0x7fd235800008

Attempting backtrace. You can use the following information to find out

where mysqld died. If you see no messages after this, something went

terribly wrong...

stack_bottom = 0x112962e60 thread_stack 0x48400

0   mysqld                              0x0000000108fc833e my_print_stacktrace + 46

0   mysqld                              0x00000001089a6d15 handle_fatal_signal + 709

0   libsystem_c.dylib                   0x00007fff8a671cfa _sigtramp + 26

0   ???                                 0x0000000000000000 0x0 + 0

0   libsystem_c.dylib                   0x00007fff8a610a7a abort + 143

0   libsystem_c.dylib                   0x00007fff8a66f84c free + 389

0   libcrypto.0.9.8.dylib               0x00007fff91ee0528 CRYPTO_free + 40

0   libcrypto.0.9.8.dylib               0x00007fff91f331de ERR_get_state + 366

0   libcrypto.0.9.8.dylib               0x00007fff91f13d83 ERR_clear_error + 19

0   libssl.0.9.8.dylib                  0x00007fff8b0e6b34 ssl23_accept + 52

0   mysqld                              0x00000001090097d1 ssl_do + 273

0   mysqld                              0x0000000108aebb9b _ZL24server_mpvio_read_packetP13st_plugin_vioPPh + 491

0   mysqld                              0x0000000108ae9dd2 _ZL28native_password_authenticateP13st_plugin_vioP25st_mysql_server_auth_info + 98

0   mysqld                              0x0000000108aeaa0c _ZL12do_auth_onceP3THDPK19st_mysql_lex_stringP9MPVIO_EXT + 204

0   mysqld                              0x0000000108b028ac _Z16acl_authenticateP3THDj + 1388

0   mysqld                              0x0000000108c3d18d _Z16login_connectionP3THD + 861

0   mysqld                              0x0000000108c3de99 _Z24do_handle_one_connectionP3THD + 601

0   mysqld                              0x0000000108c3e00e handle_one_connection + 62

0   mysqld                              0x0000000108dc2788 pfs_spawn_thread + 296

0   libsystem_c.dylib                   0x00007fff8a61d8bf _pthread_start + 335

0   libsystem_c.dylib                   0x00007fff8a620b75 thread_start + 13

Trying to get some variables.

Some pointers may be invalid and cause the dump to abort.

Query (0x0): is an invalid pointer

Connection ID (thread ID): 20

Status: NOT_KILLED

Optimizer switch: index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=off,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=off

The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains

information that should help you find out what is causing the crash.

We think the query pointer is invalid, but we will try to print it anyway. 

Query: 

Writing a core file

----------SERVER LOG END-------------

mysqltest failed but provided no output

The result from queries just before the failure was:

< snip >

master_ssl=1,

master_ssl_ca ='MYSQL_TEST_DIR/std_data/cacert.pem',

master_ssl_cert='MYSQL_TEST_DIR/std_data/client-cert.pem',

master_ssl_key='MYSQL_TEST_DIR/std_data/client-key.pem';

start slave;

insert into t1 values(1);

select * from t1;

t

1

Master_SSL_Allowed = 'Yes'

Master_SSL_CA_Path = ''

Master_SSL_CA_File = 'MYSQL_TEST_DIR/std_data/cacert.pem'

Master_SSL_Cert = 'MYSQL_TEST_DIR/std_data/client-cert.pem'

Master_SSL_Key = 'MYSQL_TEST_DIR/std_data/client-key.pem'

include/check_slave_is_running.inc

STOP SLAVE;

select * from t1;

t

1

insert into t1 values (NULL);