The original trial run had a slightly different stack;

/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld(handle_fatal_signal+0x30f)[0x6b9688]
/lib64/libpthread.so.0(+0xf5e0)[0x7f79559f55e0]
/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld(_Z34set_field_to_null_with_conversionsP5Fieldb+0x19)[0x6b4d0c]
/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld(_ZN10Item_field13save_in_fieldEP5Fieldb+0x4c)[0x6c94fc]
/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld(_ZN17Item_insert_value13save_in_fieldEP5Fieldb+0xc)[0x6d8cac]
/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld(_Z11fill_recordP3THDPP5FieldR4ListI4ItemEb+0x5c)[0x553202]
/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld(_Z36fill_record_n_invoke_before_triggersP3THDPP5FieldR4ListI4ItemEbP19Table_triggers_list14trg_event_type+0x1e)[0x5532a9]
/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld(_ZN13select_create12store_valuesER4ListI4ItemE+0x2d)[0x57ebc7]
/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld(_ZN13select_insert9send_dataER4ListI4ItemE+0x7a)[0x581414]
/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld[0x5d156e]
/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld[0x5c5096]
/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld(_Z10sub_selectP4JOINP13st_join_tableb+0x86)[0x5c52d3]
/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld[0x5ce925]
/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld(_ZN4JOIN4execEv+0x23bb)[0x5e2a63]
/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld(_Z12mysql_selectP3THDPPP4ItemP10TABLE_LISTjR4ListIS1_ES2_jP8st_orderSB_S2_SB_yP13select_resultP18st_select_lex_unitP13st_select_lex+0x686)[0x5dca23]
/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld(_Z13handle_selectP3THDP3LEXP13select_resultm+0x17b)[0x5dcc61]
/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld(_Z21mysql_execute_commandP3THD+0x1794)[0x5981d2]
/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld(_Z11mysql_parseP3THDPcjP12Parser_state+0x20a)[0x59ec81]
/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld(_Z16dispatch_command19enum_server_commandP3THDPcj+0xf4c)[0x5a0721]
/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld(_Z10do_commandP3THD+0x28b)[0x5a256f]

vs

/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld(handle_fatal_signal+0x30f)[0x6b9688]
/lib64/libpthread.so.0(+0xf5e0)[0x7fb390cfd5e0]
/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld(_ZN10Item_field13save_in_fieldEP5Fieldb+0x5d)[0x6c950d]
/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld(_Z11fill_recordP3THDPP5FieldR4ListI4ItemEb+0x5c)[0x553202]
/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld(_Z36fill_record_n_invoke_before_triggersP3THDPP5FieldR4ListI4ItemEbP19Table_triggers_list14trg_event_type+0x1e)[0x5532a9]
/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld(_ZN13select_insert12store_valuesER4ListI4ItemE+0x55)[0x57eb97]
/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld(_ZN13select_insert9send_dataER4ListI4ItemE+0x7a)[0x581414]
/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld[0x5d156e]
/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld[0x5c5096]
/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld(_Z10sub_selectP4JOINP13st_join_tableb+0x86)[0x5c52d3]
/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld[0x5ce925]
/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld(_ZN4JOIN4execEv+0x23bb)[0x5e2a63]
/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld(_Z12mysql_selectP3THDPPP4ItemP10TABLE_LISTjR4ListIS1_ES2_jP8st_orderSB_S2_SB_yP13select_resultP18st_select_lex_unitP13st_select_lex+0x686)[0x5dca23]
/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld(_Z13handle_selectP3THDP3LEXP13select_resultm+0x17b)[0x5dcc61]
/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld(_Z21mysql_execute_commandP3THD+0x3498)[0x599ed6]
/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld(_Z11mysql_parseP3THDPcjP12Parser_state+0x20a)[0x59ec81]
/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld(_Z16dispatch_command19enum_server_commandP3THDPcj+0xf4c)[0x5a0721]
/sda/PS091117-percona-server-5.5.58-38.10-linux-x86_64-debug/bin/mysqld(_Z10do_commandP3THD+0x28b)[0x5a256f]