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fix 'undefined is not iterable' when printing json output #40

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fix 'undefined is not iterable' when printing json output #40

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beerose
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@beerose beerose commented Oct 20, 2023

currently running analyze-trace with --json flag results in:

Internal Error: undefined is not iterable (cannot read property Symbol(Symbol.iterator))\nTypeError: undefined is not iterable

(getHotSpotsWorker can return undefined in some cases)

jakebailey
jakebailey reviewed Oct 20, 2023
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src/print-trace-analysis-json.ts
@@ -111,7 +111,7 @@ async function getHotSpotsWorker(curr: EventSpan, currentFile: string | undefine
// Sort slow to fast
const sortedChildren = curr.children.sort((a, b) => (b.end - b.start) - (a.end - a.start));
for (const child of sortedChildren) {
children.push(...await getHotSpotsWorker(child, currentFile, positionMap, relatedTypes, importExpressionThreshold));
children.push(...(await getHotSpotsWorker(child, currentFile, positionMap, relatedTypes, importExpressionThreshold) || []));
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This shouldn't be possible; the return type is declared as Promise<HotFrame[]>

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@beerose @jakebailey