Change the badly named RegExp.pattern to return the original source.

tests/corelib/reg_exp_pattern_test.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file

[sigurdm, 2014/04/24 11:36:42]

A few years behind ;)

[Lasse Reichstein Nielsen, 2014/04/24 12:38:10]

The import line is that old! :)
But good catch. Fixed.

 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 // Dart test for testing regular expressions in Dart.
 
 import "package:expect/expect.dart";
 
-class RegExp3Test {
-  static testMain() {
-    var i = 2000;
-    try {
-      RegExp exp = new RegExp("[");
-      i = 100;  // Should not reach here.
-    } on FormatException catch (e) {
-      i = 0;
-    }
-    Expect.equals(0, i);
+// Regression test for http://dartbug.com/17998
+
+main() {
+  for (var s in [
+         r"a",
+         r"a|b",
+         r"(?:)",
+         r"^",
+         r"$",
+         r"^$",
+         r"$^",
+         r"",
+         r"\\",
+         r"/",
+         r"[^]",
+         "\x00",
+       ]) {
+    Expect.equals(s, new RegExp(s).pattern);
   }
 }
-
-main() {
-  RegExp3Test.testMain();
-}