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Fixed an accidental undefined leak into getAccessibleSymbolChain's cache key #58669

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Merged
merged 1 commit into from
Oct 31, 2024
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Fixed an accidental undefined leak into getAccessibleSymbolChain's cache key #58669

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2 changes: 1 addition & 1 deletion src/compiler/checker.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -5473,7 +5473,7 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
const cache = (links.accessibleChainCache ||= new Map());
// Go from enclosingDeclaration to the first scope we check, so the cache is keyed off the scope and thus shared more
const firstRelevantLocation = forEachSymbolTableInScope(enclosingDeclaration, (_, __, ___, node) => node);
const key = `${useOnlyExternalAliasing ? 0 : 1}|${firstRelevantLocation && getNodeId(firstRelevantLocation)}|${meaning}`;
const key = `${useOnlyExternalAliasing ? 0 : 1}|${firstRelevantLocation ? getNodeId(firstRelevantLocation) : 0}|${meaning}`;
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I noticed that those keys could look smth like '0|undefined|788968' (I spotted an instance of that in the debugger). It bugged me enough to create this PR ;p

0 should be a safe fallback here as the lowest possible node id is 1

if (cache.has(key)) {
return cache.get(key);
}
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