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Bug #34747: crash in debug assertion check after derived table

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Was a double-free of the Unique member of Item_func_group_concat.
This was not causing a crash because the Unique is a descendent of
Sql_alloc.
Fixed to free the Unique only if it was allocated for the instance 
of Item_func_group_concat it was referenced from


mysql-test/r/func_gconcat.result:
  Bug #34747: test case
mysql-test/t/func_gconcat.test:
  Bug #34747: test case
sql/item_sum.cc:
  Bug #34747: free the Unique only if it was allocated
  for this instance of Item_func_group_concat
This commit is contained in:
unknown
2008-02-28 13:31:19 +02:00
parent 87007702fe
commit f28612eae2
3 changed files with 33 additions and 1 deletions
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17
mysql-test/t/func_gconcat.test
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@ -640,4 +640,21 @@ SELECT GROUP_CONCAT(DISTINCT b, a ORDER BY b) FROM t1;
DROP TABLE t1, t2, t3;
#
# Bug #34747: crash in debug assertion check after derived table
#
CREATE TABLE t1(a INT);
INSERT INTO t1 VALUES (),();
SELECT s1.d1 FROM
(
SELECT
t1.a as d1,
GROUP_CONCAT(DISTINCT t1.a) AS d2
FROM
t1 AS t1,
t1 AS t2
GROUP BY 1
) AS s1;
DROP TABLE t1;
--echo End of 5.0 tests