Stage 3 proposal: https://github.com/tc39/proposal-json-parse-with-source
<rdar://problem/102646189>
Raised critical issue, which causes Assertion crash right now, according to the spec. https://github.com/tc39/proposal-json-parse-with-source/issues/39#issue-1470774426
Pull request: https://github.com/WebKit/WebKit/pull/7057