| Index: compiler/java/com/google/dart/compiler/common/SourceInfo.java | 
| diff --git a/compiler/java/com/google/dart/compiler/common/SourceInfo.java b/compiler/java/com/google/dart/compiler/common/SourceInfo.java | 
| index 44ead65065e7f2f85404a450561eafce957ba926..0ae843a1f10b3e6c1304e6749be820afda397548 100644 | 
| --- a/compiler/java/com/google/dart/compiler/common/SourceInfo.java | 
| +++ b/compiler/java/com/google/dart/compiler/common/SourceInfo.java | 
| @@ -161,6 +161,9 @@ public final class SourceInfo implements Serializable { | 
| } | 
|  | 
| int getLineOffset(int line) { | 
| +      if (line < 0) { | 
| +        return 0; | 
| +      } | 
| return lineOffsets.get(line); | 
| } | 
|  | 
|  |