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Fix warning discovered by ASAN

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Patch submitted by Eugene Kosov <claprix@yandex.ru>,
comments added by commiter.

Signed-off-by: Vicențiu Ciorbaru <vicentiu@mariadb.org>
This commit is contained in:
Eugene Kosov
2017-07-05 18:27:03 +03:00
committed by Vicențiu Ciorbaru
parent e555540ab6
commit 4693f01f57
1 changed files with 5 additions and 2 deletions
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7
sql/sql_explain.cc
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@@ -349,10 +349,13 @@ int print_explain_row(select_result_sink *result,
item_list.push_back(new (mem_root) Item_string_sys(thd, jtype_str),
mem_root);
/* 'possible_keys' */
/* 'possible_keys'
The buffer must not be deallocated before we call send_data, otherwise
we may end up reading freed memory.
*/
StringBuffer<64> possible_keys_buf;
if (possible_keys && !possible_keys->is_empty())
{
StringBuffer<64> possible_keys_buf;
push_string_list(thd, &item_list, *possible_keys, &possible_keys_buf);
}
else