WebKit JSC BindingNode::bindValue Failed Reference Count Increase

WebKit: JSC: BindingNode::bindValue doesn't increase the scope's reference count CVE-2017-2505 Here's a snippet of BindingNode::bindValue. void BindingNode::bindValueBytecodeGenerator& generator, RegisterID value const ... RegisterID scope = generator.emitResolveScopenullptr, var;...