include file info with error object when parse fails

src/Module.js

@@ -18,10 +18,16 @@ export default class Module {
 			filename: path
 		});
 
-		this.ast = parse( code, {
-			ecmaVersion: 6,
-			sourceType: 'module'
-		});
+		try {
+			this.ast = parse( code, {
+				ecmaVersion: 6,
+				sourceType: 'module'
+			});
+		} catch ( err ) {
+			err.file = path;
+			throw err;
+		}
+
 
 		this.analyse();
 	}
@@ -311,4 +317,4 @@ export default class Module {
 			this.defaultExportName = name;
 		}
 	}
-}
+}

test/samples/import-not-at-top-level-fails/_config.js

@@ -1,8 +1,11 @@
+var path = require( 'path' );
 var assert = require( 'assert' );
 
 module.exports = {
 	description: 'disallows non-top-level imports',
 	error: function ( err ) {
-		assert.ok( false, 'TODO: pick an error message' );
+		assert.equal( err.file, path.resolve( __dirname, 'main.js' ) );
+		assert.deepEqual( err.loc, { line: 2, column: 2 });
+		assert.ok( /may only appear at the top level/.test( err.message ) );
 	}
 };