Dereferencing a null pointer in Escargot::AssignmentExpressionSimpleNode::generateExpressionByteCode() about escargot

[rerobika]

@clover2123 Thanks for the report, I'll take a look at it. I think some kind of pattern declaration validation is missing, since this test case should throw SyntaxError.

[clover2123]

The null pointer in AssignmentExpressionNode::m_left is originated from Escargot::ObjectPatternNode::generateExpressionByteCode().
In this function, Node key which is assigned to the m_left value of AssignmentExpressionNode can be allocated no value.

[clover2123]

#264 handled the bug but it's just a temporal fix (not a complete solution) which throws a ByteCodeGenerateError.

[zherczeg]

I don't see this issue anymore so closing bug. Please reopen if needed.

[clover2123]

This issue is not resolved yet. I'm handling this issue now and will close it after the issue is completely fixed.

[clover2123]

Fixed by #412.