mysqld: /data/src/10.2/sql/item.cc:6742: virtual bool Item::send(Protocol*, String*): Assertion `null_value' failed.
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161201 23:12:32 [ERROR] mysqld got signal 6 ;
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#7 0x00007f2283e83312 in __GI___assert_fail (assertion=0x7f228749cc74 "null_value", file=0x7f228749c2f8 "/data/src/10.2/sql/item.cc", line=6742, function=0x7f228749f5a0 <Item::send(Protocol*, String*)::__PRETTY_FUNCTION__> "virtual bool Item::send(Protocol*, String*)") at assert.c:101
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#8 0x00007f2286be453d in Item::send (this=0x7f223f0601b8, protocol=0x7f223f016600, buffer=0x7f2287a577a0) at /data/src/10.2/sql/item.cc:6742
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#9 0x00007f2286893178 in Protocol::send_result_set_row (this=0x7f223f016600, row_items=0x7f223f01a3a8) at /data/src/10.2/sql/protocol.cc:979
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#10 0x00007f2286911e50 in select_send::send_data (this=0x7f223f060330, items=...) at /data/src/10.2/sql/sql_class.cc:2915
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#11 0x00007f228699ee4f in JOIN::exec_inner (this=0x7f223f060350) at /data/src/10.2/sql/sql_select.cc:3278
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#12 0x00007f228699e8ea in JOIN::exec (this=0x7f223f060350) at /data/src/10.2/sql/sql_select.cc:3198
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#13 0x00007f228699fa41 in mysql_select (thd=0x7f223f016070, tables=0x0, wild_num=0, fields=..., conds=0x0, og_num=0, order=0x0, group=0x0, having=0x0, proc_param=0x0, select_options=2147748608, result=0x7f223f060330, unit=0x7f223f019b48, select_lex=0x7f223f01a280) at /data/src/10.2/sql/sql_select.cc:3583
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#14 0x00007f2286994b25 in handle_select (thd=0x7f223f016070, lex=0x7f223f019a80, result=0x7f223f060330, setup_tables_done_option=0) at /data/src/10.2/sql/sql_select.cc:373
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#15 0x00007f228696146f in execute_sqlcom_select (thd=0x7f223f016070, all_tables=0x0) at /data/src/10.2/sql/sql_parse.cc:6356
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#16 0x00007f2286956f2a in mysql_execute_command (thd=0x7f223f016070) at /data/src/10.2/sql/sql_parse.cc:3379
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#17 0x00007f2286964e2e in mysql_parse (thd=0x7f223f016070, rawbuf=0x7f223f060088 "SELECT CAST(NULL AS JSON)", length=25, parser_state=0x7f2287a58e20, is_com_multi=false, is_next_command=false) at /data/src/10.2/sql/sql_parse.cc:7799
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#18 0x00007f2286952b7e in dispatch_command (command=COM_QUERY, thd=0x7f223f016070, packet=0x7f223f054071 "", packet_length=25, is_com_multi=false, is_next_command=false) at /data/src/10.2/sql/sql_parse.cc:1808
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#19 0x00007f2286951558 in do_command (thd=0x7f223f016070) at /data/src/10.2/sql/sql_parse.cc:1368
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#20 0x00007f2286a98a26 in do_handle_one_connection (connect=0x7f228345ff70) at /data/src/10.2/sql/sql_connect.cc:1354
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#21 0x00007f2286a987b3 in handle_one_connection (arg=0x7f228345ff70) at /data/src/10.2/sql/sql_connect.cc:1260
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#22 0x00007f2285f900a4 in start_thread (arg=0x7f2287a5a300) at pthread_create.c:309
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#23 0x00007f2283f3d87d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111
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