Retry DRT if we crash with core dump.

tools/testing/dart/test_runner.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // 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.
 
 /**
  * Classes and methods for executing tests.
  *
  * This module includes:
  * - Managing parallel execution of tests, including timeout checks.
  * - Evaluating the output of each test as pass/fail/crash/timeout.
@@ skipping 195 matching lines @@
     for (String line in stdout) {
       if (line == 'PASS' && previous_line == 'Content-Type: text/plain') {
         return (exitCode != 0 && !hasCrashed);
       }
       previous_line = line;
     }
 
     // If the browser test failed, it may have been because DumpRenderTree
     // and the virtual framebuffer X server didn't hook up.
     for (String line in stderr) {
-      if (line.contains('Gtk-WARNING **: cannot open display: :99')) {
-        // If we get the X server error, return the expected value
-        // We cannot restart the test from here.  Issue dart:1135 is filed.
+      if (line.contains('Gtk-WARNING **: cannot open display: :99') ||
+        line.contains('Failed to run command. return code=1')) {
+        // If we get the X server error, or DRT crashes with a core dump, retry
+        // the test. 
         requestRetry = true;
         return true;
       }
     }
     return true;
   }
 
   // Reverse result of a negative test.
   bool get hasFailed() => (testCase.isNegative ? !didFail : didFail);
 }
@@ skipping 472 matching lines @@
           test.displayName != 'dartc/junit_tests') {
         _ensureDartcBatchRunnersStarted(test.executablePath);
         _getDartcBatchRunnerProcess().startTest(test);
       } else {
         new RunningProcess(test).start();
       }
       _numProcesses++;
     }
   }
 }