angular/angular · error · BabelParseError

Missing declaration for return value from helper.

Error message

Missing declaration for return value from helper.

What it means

Error "Missing declaration for return value from helper." thrown in angular/angular.

Source

Thrown at packages/localize/tools/src/source_file_utils.ts:339

  }
  const lazyLoadFn = lazyLoadBinding.path;
  if (!lazyLoadFn.isFunctionDeclaration()) {
    throw new BabelParseError(
      lazyLoadFn.node,
      'Unexpected expression (expected a function declaration',
    );
  }
  const returnedNode = getReturnedExpression(lazyLoadFn);

  if (returnedNode.isCallExpression()) {
    return returnedNode;
  }

  if (returnedNode.isIdentifier()) {
    const identifierName = returnedNode.node.name;
    const declaration = returnedNode.scope.getBinding(identifierName);
    if (declaration === undefined) {
      throw new BabelParseError(
        returnedNode.node,
        'Missing declaration for return value from helper.',
      );
    }
    if (!declaration.path.isVariableDeclarator()) {
      throw new BabelParseError(
        declaration.path.node,
        'Unexpected helper return value declaration (expected a variable declaration).',
      );
    }
    const initializer = declaration.path.get('init');
    if (!initializer.isCallExpression()) {
      throw new BabelParseError(
        declaration.path.node,
        'Unexpected return value from helper (expected a call expression).',
      );
    }

View on GitHub (pinned to 51cb07e980)

Solutions

1. The helper function is missing its return statement declaration; keep the generated helper code intact.

When it happens

Trigger: Thrown at packages/localize/tools/src/source_file_utils.ts:339 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of angular/angular@51cb07e980 (2026-08-22). Data as JSON: /api/errors/cbaf9f4a2041e248. Report an issue: GitHub.