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fix(traverse): do not return null NodePath in getCompletionRecords for IfStatement without alternate - #18584
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rohanbuildai wants to merge 1 commit into
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fix(traverse): do not return null NodePath in getCompletionRecords for IfStatement without alternate#18584rohanbuildai wants to merge 1 commit into
rohanbuildai wants to merge 1 commit into
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…r IfStatement without alternate Assisted-by: Gemini 3.8 Flash
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rohanbuildai
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November 11, 2026 09:53
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When
getCompletionRecordstraverses anIfStatementwithout analternatebranch (e.g.if (c) { return 1; }),path.get("alternate")yields aNodePath<null>where.nodeisnull.Currently,
addCompletionRecordschecksif (path). Because theNodePathinstance is truthy, it forwards the null path to_getCompletionRecords, which defaults to pushing aNormalCompletionwithnode: null. This results ingetCompletionRecords()returning paths that have no underlying AST node and this is obviously going to solve the problem by ensuringaddCompletionRecordschecksif (path?.hasNode())before collecting records.We also remove the
@ts-expect-error FIXME: path may be NodePath<null>comment as the check is now type-safe and add a unit test inpackages/babel-traverse/test/family.js.Assisted-by: Gemini 3.8 Flash