| Index: sdk/lib/_internal/dartdoc/bin/dartdoc.dart
 | 
| diff --git a/sdk/lib/_internal/dartdoc/bin/dartdoc.dart b/sdk/lib/_internal/dartdoc/bin/dartdoc.dart
 | 
| index 7159ba813bcc4cf9e727153d9ba2761a7bc761a7..47eb8285ee756cb424a2c3b44eae8e89233b7783 100644
 | 
| --- a/sdk/lib/_internal/dartdoc/bin/dartdoc.dart
 | 
| +++ b/sdk/lib/_internal/dartdoc/bin/dartdoc.dart
 | 
| @@ -251,6 +251,8 @@ main() {
 | 
|      })
 | 
|      .catchError((e) {
 | 
|        print('Error: generation failed: ${e}');
 | 
| +      var trace = getAttachedStackTrace(e);
 | 
| +      if (trace != null) print("StackTrace: $trace");
 | 
|        dartdoc.cleanup();
 | 
|        exit(1);
 | 
|      })
 | 
| 
 |