Looks like the following fix is not merged to 10.0. Though I couldn't reproduce valgrind warning with provided test case. Please check if the fix is worthy.
revno: 3308
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committer: Sergey Glukhov <sergey.glukhov@oracle.com>
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branch nick: mysql-trunk
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timestamp: Wed 2011-07-27 12:06:39 +0400
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message:
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Bug#11766684 59851: UNINITIALISED VALUE IN ITEM_FUNC_LIKE::SELECT_OPTIMIZE WITH SUBQUERY AND
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There is an attempt to use uninitialized string buffer
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in case of empty wildcard. The fix is to add string
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length check for wilcard argument.
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- is part of
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MDEV-4784
merge test cases from 5.6
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Stalled
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Bug
Critical