Fix the handling of line offset when getting the source line from a ScriptMirror

src/messages.js

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 284 matching lines @@
   // Default is first column. If on the first line add the offset within the
   // resource.
   var column = opt_column || 0;
   if (line == 0) {
     column -= this.column_offset
   }
 
   var offset_position = opt_offset_position || 0;
   if (line < 0 || column < 0 || offset_position < 0) return null;
   if (line == 0) {
-    return this.locationFromPosition(offset_position + column);
+    return this.locationFromPosition(offset_position + column, false);
   } else {
     // Find the line where the offset position is located
     var lineCount = this.lineCount();
     var offset_line;
     for (var i = 0; i < lineCount; i++) {
       if (offset_position <= this.line_ends[i]) {
         offset_line = i;
         break;
       }
     }
@@ skipping 196 matching lines @@
  *     the line terminating characters (if any)
  */
 SourceSlice.prototype.sourceText = function () {
   return this.script.source.substring(this.from_position, this.to_position);
 };
 
 
 // Returns the offset of the given position within the containing
 // line.
 function GetPositionInLine(message) {
-  var location = message.script.locationFromPosition(message.startPos);
+  var location = message.script.locationFromPosition(message.startPos, false);
   if (location == null) return -1;
   location.restrict();
   return message.startPos - location.start;
 }
 
 
 function ErrorMessage(type, args, startPos, endPos, script, stackTrace) {
   this.startPos = startPos;
   this.endPos = endPos;
   this.type = type;
@@ skipping 144 matching lines @@
     return this.name + ": " + FormatMessage({ type: type, args: this.arguments });
   }
   var message = this.message;
   return this.name + (message ? (": " + message) : "");
 }, DONT_ENUM);
 
 
 // Boilerplate for exceptions for stack overflows. Used from
 // Top::StackOverflow().
 const kStackOverflowBoilerplate = MakeRangeError('stack_overflow', []);