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| author | Guilhem Bichot <guilhem@mysql.com> | 2010-11-22 09:57:59 +0100 |
|---|---|---|
| committer | Guilhem Bichot <guilhem@mysql.com> | 2010-11-22 09:57:59 +0100 |
| commit | 96b0404940f7b704c4f8dd599455d4d2f013a297 (patch) | |
| tree | 65c9141fa692262975bd2d03b092a1d54a142d97 /mysql-test/t/user_var.test | |
| parent | a6294cd5cbd02c48b28fe8b380f8c259f14f9d8c (diff) | |
| download | mariadb-git-96b0404940f7b704c4f8dd599455d4d2f013a297.tar.gz | |
Fix for Bug#56138 "valgrind errors about overlapping memory when double-assigning same variable",
and related small fixes.
mysql-test/t/user_var.test:
test for bug
sql/field_conv.cc:
From the C standard, memcpy() has undefined behaviour if to->ptr==from->ptr
sql/item_func.cc:
In the case of BUG#56138, entry->value==ptr in which case memcpy()
has undefined results per the C standard.
sql/sql_select.cc:
Work around a bug in old gcc
Diffstat (limited to 'mysql-test/t/user_var.test')
| -rw-r--r-- | mysql-test/t/user_var.test | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/mysql-test/t/user_var.test b/mysql-test/t/user_var.test index 4f27866de23..56217fe67d5 100644 --- a/mysql-test/t/user_var.test +++ b/mysql-test/t/user_var.test @@ -346,4 +346,11 @@ FROM t1 GROUP BY a LIMIT 1; DROP TABLE t1; +# +# BUG#56138 "valgrind errors about overlapping memory when +# double-assigning same variable" +# + +select @v:=@v:=sum(1) from dual; + --echo End of 5.1 tests |