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fix: load WASM grammars sequentially to avoid Node 20+ race condition #40

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Merged
colbymchenry merged 1 commit into from
Feb 19, 2026
Merged

fix: load WASM grammars sequentially to avoid Node 20+ race condition #40

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27 changes: 13 additions & 14 deletions src/extraction/grammars.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -86,21 +86,20 @@ export async function initGrammars(): Promise<void> {

await Parser.init();

// Load all grammars in parallel
// Load grammars sequentially to avoid web-tree-sitter WASM race condition on Node 20+
// See: https://github.com/tree-sitter/tree-sitter/issues/2338
const entries = Object.entries(WASM_GRAMMAR_FILES) as [GrammarLanguage, string][];
await Promise.allSettled(
entries.map(async ([lang, wasmFile]) => {
try {
const wasmPath = require.resolve(`tree-sitter-wasms/out/${wasmFile}`);
const language = await WasmLanguage.load(wasmPath);
languageCache.set(lang, language);
} catch (error) {
const message = error instanceof Error ? error.message : String(error);
console.warn(`[CodeGraph] Failed to load ${lang} grammar — parsing will be unavailable: ${message}`);
unavailableGrammarErrors.set(lang, message);
}
})
);
for (const [lang, wasmFile] of entries) {
try {
const wasmPath = require.resolve(`tree-sitter-wasms/out/${wasmFile}`);
const language = await WasmLanguage.load(wasmPath);
languageCache.set(lang, language);
} catch (error) {
const message = error instanceof Error ? error.message : String(error);
console.warn(`[CodeGraph] Failed to load ${lang} grammar — parsing will be unavailable: ${message}`);
unavailableGrammarErrors.set(lang, message);
}
}

grammarsInitialized = true;
}
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