Alex Zinenko 3b7b0040ce FunctionParser::~FunctionParser: avoid iterator invalidation ... When destroying a FunctionParser in case of parsing failure, we clean up all uses of undefined forward-declared references. This has been implemented as iteration over the list of uses. However, deleting one use from the list invalidates the iterator (`IROperand::drop` sets `nextUse` to `nullptr` while the iterator reads `nextUse` to advance; therefore only the first use was deleted from the list). Get a new iterator before calling drop to avoid invalidation. PiperOrigin-RevId: 228168849		2019-03-29 15:00:10 -07:00
mlir	FunctionParser::~FunctionParser: avoid iterator invalidation	2019-03-29 15:00:10 -07:00