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MDEV-12209 sql_mode=ORACLE: Syntax error in a OPEN cursor with parame…
…ters makes the server crash The bug was introduced in the patch for "MDEV-10597 Cursors with parameters". The LEX created in assignment_source_expr was not put into thd->lex->sphead->m_lex (the stack of LEX'es), so syntax error in "expr" caused a wrong memory cleanup in sp_head::~sp_head(). The fix changes the code to use sp_head::push_lex() followed by sp_head::restore_lex(), like it happens in all other similar cases.
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Alexander Barkov
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Apr 5, 2017
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