microsoft/vscode · error

Language ${languageId} is not supported

Error message

Language ${languageId} is not supported

What it means

Error "Language ${languageId} is not supported" thrown in microsoft/vscode.

Source

Thrown at extensions/copilot/src/extension/completions-core/vscode-node/prompt/src/parseBlock.ts:951

		/* languageId */ 'cpp',
		/* nodeMatch */ {
			// TODO -- unused in the current usage.
		},
		/* nodeTypesWithBlockOrStmtChild */ new Map([
			// TODO -- unused in the current usage.
		]),
		/* startKeywords */[
			// TODO -- unused in the current usage.
		],
		/* blockNodeType */ 'block',
		/* emptyStatementType */ null,
		/* curlyBraceLanguage */ true
	),
};

export function getBlockParser(languageId: string): BlockParser {
	if (!isSupportedLanguageId(languageId)) {
		throw new Error(`Language ${languageId} is not supported`);
	}
	return wasmLanguageToBlockParser[languageIdToWasmLanguage(languageId)];
}

export async function isEmptyBlockStart(languageId: string, text: string, offset: number) {
	if (!isSupportedLanguageId(languageId)) {
		return false;
	}
	return getBlockParser(languageId).isEmptyBlockStart(text, offset);
}

export async function isBlockBodyFinished(languageId: string, prefix: string, completion: string, offset: number) {
	if (!isSupportedLanguageId(languageId)) {
		return undefined;
	}
	return getBlockParser(languageId).isBlockBodyFinished(prefix, completion, offset);
}

View on GitHub (pinned to a94b963a32)

When it happens

Trigger: Thrown at extensions/copilot/src/extension/completions-core/vscode-node/prompt/src/parseBlock.ts:951 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of microsoft/vscode@a94b963a32 (2026-08-12). Data as JSON: /api/errors/83dd0bd924b8ffd4. Report an issue: GitHub.