2021-12-08 20:52:48 4 [ERROR] Json_writer: a member name was expected.
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mariadbd: /data/src/10.8/sql/my_json_writer.cc:49: void Json_writer::on_start_object(): Assertion `got_name == named_item_expected()' failed.
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211208 20:52:48 [ERROR] mysqld got signal 6 ;
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#7 0x00007f5a371e3f36 in __GI___assert_fail (assertion=0x564ddc8c6a28 "got_name == named_item_expected()", file=0x564ddc8c6a50 "/data/src/10.8/sql/my_json_writer.cc", line=49, function=0x564ddc8c6a78 "void Json_writer::on_start_object()") at assert.c:101
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#8 0x0000564ddbd0f6bc in Json_writer::on_start_object (this=0x7f5a31a0c6f0) at /data/src/10.8/sql/my_json_writer.cc:49
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#9 0x0000564ddbd0d7da in Json_writer::start_object (this=0x7f5a31a0c6f0) at /data/src/10.8/sql/my_json_writer.cc:59
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#10 0x0000564ddb95b00e in Json_writer_object::Json_writer_object (this=0x7f5a31a0c510, writer=0x7f5a31a0c6f0, str=0x0) at /data/src/10.8/sql/my_json_writer.h:445
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#11 0x0000564ddbcc3abc in Explain_table_access::print_explain_json (this=0x7f5a200606a0, query=0x7f5a20056288, writer=0x7f5a31a0c6f0, is_analyze=true) at /data/src/10.8/sql/sql_explain.cc:1694
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#12 0x0000564ddbcc18a5 in Explain_basic_join::print_explain_json_interns (this=0x7f5a2005fc90, query=0x7f5a20056288, writer=0x7f5a31a0c6f0, is_analyze=true) at /data/src/10.8/sql/sql_explain.cc:1105
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#13 0x0000564ddbcc1262 in Explain_select::print_explain_json (this=0x7f5a2005fc90, query=0x7f5a20056288, writer=0x7f5a31a0c6f0, is_analyze=true) at /data/src/10.8/sql/sql_explain.cc:1001
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#14 0x0000564ddbcbe412 in Explain_query::print_explain_json (this=0x7f5a20056288, output=0x7f5a20060a18, is_analyze=true) at /data/src/10.8/sql/sql_explain.cc:234
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#15 0x0000564ddbcbe141 in Explain_query::send_explain (this=0x7f5a20056288, thd=0x7f5a20000db8) at /data/src/10.8/sql/sql_explain.cc:177
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#16 0x0000564ddbaaff9c in execute_sqlcom_select (thd=0x7f5a20000db8, all_tables=0x7f5a20015b38) at /data/src/10.8/sql/sql_parse.cc:6265
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#17 0x0000564ddbaa7168 in mysql_execute_command (thd=0x7f5a20000db8, is_called_from_prepared_stmt=false) at /data/src/10.8/sql/sql_parse.cc:3944
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#18 0x0000564ddbab4d2a in mysql_parse (thd=0x7f5a20000db8, rawbuf=0x7f5a20015400 "ANALYZE FORMAT=JSON SELECT * FROM t t1 WHERE t1.a IN (SELECT t2.a FROM t t2 WHERE t1.a IN (SELECT t3.a FROM t t3))", length=114, parser_state=0x7f5a31a0d480) at /data/src/10.8/sql/sql_parse.cc:8028
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#19 0x0000564ddbaa117e in dispatch_command (command=COM_QUERY, thd=0x7f5a20000db8, packet=0x7f5a2000b989 "", packet_length=114, blocking=true) at /data/src/10.8/sql/sql_parse.cc:1894
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#20 0x0000564ddba9fb1a in do_command (thd=0x7f5a20000db8, blocking=true) at /data/src/10.8/sql/sql_parse.cc:1402
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#21 0x0000564ddbc75559 in do_handle_one_connection (connect=0x564ddefa0b18, put_in_cache=true) at /data/src/10.8/sql/sql_connect.cc:1418
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#22 0x0000564ddbc751e9 in handle_one_connection (arg=0x564ddefa3178) at /data/src/10.8/sql/sql_connect.cc:1312
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#23 0x0000564ddc1786a7 in pfs_spawn_thread (arg=0x564ddefa0668) at /data/src/10.8/storage/perfschema/pfs.cc:2201
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#24 0x00007f5a376fc609 in start_thread (arg=<optimized out>) at pthread_create.c:477
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#25 0x00007f5a372cf293 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
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