| Index: pkg/analyzer/lib/src/string_source.dart
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| diff --git a/pkg/analyzer/lib/src/string_source.dart b/pkg/analyzer/lib/src/string_source.dart
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| index 24d55c1fb31f389d56f7b632abc6201f70d7df78..0b7080ec28a695658f886bfcf3d70c89a796414c 100644
 | 
| --- a/pkg/analyzer/lib/src/string_source.dart
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| +++ b/pkg/analyzer/lib/src/string_source.dart
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| @@ -40,6 +40,10 @@ class StringSource implements Source {
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|  
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|    bool get isInSystemLibrary => false;
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|  
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| -  Source resolveRelative(Uri relativeUri) => throw new UnsupportedError(
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| +  @override
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| +  Uri get uri => throw new UnsupportedError(
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| +      "StringSource doesn't support uri.");
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| +
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| +  Uri resolveRelative(Uri relativeUri) => throw new UnsupportedError(
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|        "StringSource doesn't support resolveRelative.");
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|  }
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| 
 |