anchor.diff:        : super._(displayName, outputFile, neverSkipCompilation,
                   bootstrapDependencies, executable, arguments,
                   environmentOverrides);
  +
  +  int get maxNumRetries => 1;
   }
   
   /// This is just a Pair(String, Map) class with hashCode and operator ==
  
positive.code:       }
      }
  
      // We currently rerun dartium tests, see issue 14074.
      final command = output.command;
      if (command is BrowserTestCommand &&
          command.retry &&
          command.browser == 'dartium') {
        return true;
      }
    }
    return false;
  }
  
negative.code:       }
      }
  
      final command = output.command;
  
      // The dartk batch compiler sometimes runs out of memory. In such a case we
      // will retry running it.
      if (command is KernelCompilationCommand) {
        if (output.hasCrashed) {
          bool containsOutOfMemoryMessage(String line) {
            return line.contains('Exhausted heap space, trying to allocat');
          }
  
          decodeOutput();
          if (stdout.any(containsOutOfMemoryMessage) ||
              stderr.any(containsOutOfMemoryMessage)) {
            return true;
          }
        }
      }
  
      // We currently rerun dartium tests, see issue 14074.
      if (command is BrowserTestCommand &&
          command.retry &&
          command.browser == 'dartium') {
        return true;
      }
  
      if (io.Platform.operatingSystem == 'linux') {
        decodeOutput();
        // No matter which command we ran: If we get failures due to the
  