Context flag for with statements to avoid parent pointer walks #17900
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We use
isInWithStatementBody
as a bailout condition all over the place in the checker - the most frequent places being at the top ofgetTypeOfNode
and insidegetContextualType
. However it comes at a steep cost, as we are pretty much never within awith
statement body (they're not even valid syntax in strict mode), so we always walk all the way up to the containing source file.