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Fix a crash in an anonymous buffer that copilot is writing to. #60377

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Oct 30, 2024
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Fix a crash in an anonymous buffer that copilot is writing to. #60377

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1 change: 1 addition & 0 deletions src/server/scriptVersionCache.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -632,6 +632,7 @@ export class LineNode implements LineCollection {

walk(rangeStart: number, rangeLength: number, walkFns: LineIndexWalker): void {
// assume (rangeStart < this.totalChars) && (rangeLength <= this.totalChars)
if (this.children.length === 0) return;
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Is this.children always defined?

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@sandersn sandersn Oct 30, 2024 •
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Yes, the type is LineCollection[] and the constructor defaults it to [] if it's not provided.

Edit: in fact, there are no explicit assignments to it; just the implicit private readonly children: LineCollection[] = [] in the constructor.

let childIndex = 0;
let childCharCount = this.children[childIndex].charCount();
// find sub-tree containing start
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