[MDEV-10786] [Draft] Assertion failed: fixed == 0 Created: 2016-09-09  Updated: 2016-09-13  Resolved: 2016-09-13

Status: Closed
Project: MariaDB Server
Component/s: Optimizer
Affects Version/s: 10.2
Fix Version/s: 10.2.2

Type: Bug Priority: Major
Reporter: Elena Stepanova Assignee: Unassigned
Resolution: Fixed Votes: 0
Labels: None


 Description   

http://buildbot.askmonty.org/buildbot/builders/win-rqg-se/builds/2681/steps/rqg_crash_tests/logs/stdio

Assertion failed: fixed == 0, file E:\buildbot\bbwin1\win-rqg-se\build-debug\sql\item.cc, line 5115
R6010
- abort() has been called
160909  0:44:14 [ERROR] mysqld got exception 0x80000003 ;
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: 10.2.2-MariaDB-debug-log
key_buffer_size=1048576
read_buffer_size=131072
max_used_connections=7
max_threads=1001
thread_count=6
It is possible that mysqld could use up to 
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 388182 K  bytes of memory
Hope that's ok; if not, decrease some variables in the equation.
 
Thread pointer: 0x0x29bcdf8a58
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...
mysqld.exe!my_sigabrt_handler()[my_thr_init.c:477]
mysqld.exe!raise()[winsig.c:594]
mysqld.exe!abort()[abort.c:82]
mysqld.exe!_wassert()[assert.c:380]
mysqld.exe!Item_field::fix_fields()[item.cc:5115]
mysqld.exe!Item_sum_num::fix_fields()[item_sum.cc:1085]
mysqld.exe!setup_fields()[sql_base.cc:6957]
mysqld.exe!JOIN::prepare()[sql_select.cc:802]
mysqld.exe!subselect_single_select_engine::prepare()[item_subselect.cc:3569]
mysqld.exe!Item_subselect::fix_fields()[item_subselect.cc:267]
mysqld.exe!Item_func::fix_fields()[item_func.cc:209]
mysqld.exe!Item_cond::fix_fields()[item_cmpfunc.cc:4526]
mysqld.exe!pushdown_cond_for_derived()[sql_derived.cc:1204]
mysqld.exe!JOIN::optimize_inner()[sql_select.cc:1277]
mysqld.exe!JOIN::optimize()[sql_select.cc:1072]
mysqld.exe!mysql_select()[sql_select.cc:3547]
mysqld.exe!handle_select()[sql_select.cc:373]
mysqld.exe!execute_sqlcom_select()[sql_parse.cc:6333]
mysqld.exe!mysql_execute_command()[sql_parse.cc:3364]
mysqld.exe!mysql_parse()[sql_parse.cc:7759]
mysqld.exe!dispatch_command()[sql_parse.cc:1796]
mysqld.exe!do_command()[sql_parse.cc:1353]
mysqld.exe!threadpool_process_request()[threadpool_common.cc:252]
mysqld.exe!io_completion_callback()[threadpool_win.cc:462]
KERNEL32.DLL!VirtualUnlock()
ntdll.dll!RtlGetActiveActivationContext()
ntdll.dll!RtlFreeUnicodeString()
KERNEL32.DLL!BaseThreadInitThunk()
ntdll.dll!RtlUserThreadStart()
 
Trying to get some variables.
Some pointers may be invalid and cause the dump to abort.
Query (0x29bcf9f3a0): SELECT DISTINCT alias1.`col_int_key` AS field1, 'y' AS cfield1, alias1.`col_int_key` AS ifield1, alias1.`col_varchar_nokey` AS field2, alias1.`col_varchar_key` AS cfield2, alias1.`col_time_nokey` AS field3, alias1.`col_int_key` AS ifield2, alias1.`col_time_key` AS field4, alias1.`col_date_key` AS field5, alias1.`pk` AS ifield3, alias1.`col_int_key` AS field6 FROM ( `e` AS alias1 RIGHT JOIN ( SELECT DISTINCT SQ1_alias1.* FROM ( `d` AS SQ1_alias1 STRAIGHT_JOIN `cc` AS SQ1_alias2 ON (SQ1_alias2.`col_varchar_key` = SQ1_alias1.`col_varchar_key` ) ) WHERE SQ1_alias1.`col_varchar_nokey` != SQ1_alias1.`col_varchar_key` ) AS alias2 ON (( alias2.`col_int_nokey` = alias1.`col_int_key` ) AND ( alias2.`col_varchar_key` < alias1.`col_varchar_key` ) ) ) WHERE alias2.`col_int_nokey` = ( SELECT COUNT( SQ2_alias1.`pk` ) AS SQ2_ifield1 FROM `b` AS SQ2_alias1 ) ORDER BY field6, field1, field5, field3, field2, field4, cfield2 /* QUERY_NO 408 CON_ID 12 */
Connection ID (thread ID): 12
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,condition_pushdown_for_derived=on



 Comments   
Comment by Elena Stepanova [ 2016-09-13 ]

It was fixed by this patch:

commit 3630a00e258273ada7f783a514600aafcd3f13f9
Author: Igor Babaev <igor@askmonty.org>
Date:   Mon Sep 12 00:07:02 2016 -0700
 
    Fixed bug mdev-10782.
    This bug in the code of Item_ref::build_clone could
    cause corruption of items in where conditions.
    Also made sure that equality predicates extracted
    from multiple equality items to be pushed into
    materialized views were cloned.

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