From 75c407b110a48e993b3941971b2f718c32f8daf5 Mon Sep 17 00:00:00 2001
From: Alex Ross <alros@microsoft.com>
Date: Wed, 21 Aug 2024 16:55:36 +0200
Subject: [PATCH] Fix bug loading languages many times Part of #210475

---
 .../services/treeSitter/treeSitterParserService.ts       | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/src/vs/editor/browser/services/treeSitter/treeSitterParserService.ts b/src/vs/editor/browser/services/treeSitter/treeSitterParserService.ts
index 5433241400bcd..0065ed2daf249 100644
--- a/src/vs/editor/browser/services/treeSitter/treeSitterParserService.ts
+++ b/src/vs/editor/browser/services/treeSitter/treeSitterParserService.ts
@@ -252,11 +252,10 @@ export class TreeSitterLanguages extends Disposable {
 	}
 
 	private async _addLanguage(languageId: string): Promise<void> {
-		let language = this._languages.getSyncIfCached(languageId);
-		if (!language) {
-			const fetchPromise = this._fetchLanguage(languageId);
-			this._languages.set(languageId, fetchPromise);
-			language = await fetchPromise;
+		const languagePromise = this._languages.get(languageId);
+		if (!languagePromise) {
+			this._languages.set(languageId, this._fetchLanguage(languageId));
+			const language = await this._languages.get(languageId);
 			if (!language) {
 				return undefined;
 			}