Add stacktrace_test

tests/compiler/dart2js/sourcemaps/diff_view.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library sourcemap.diff_view;
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 
@@ skipping 51 matching lines @@
       filename = arg;
     }
   }
   List<String> commonArguments = optionSegments[0];
   List<List<String>> options = <List<String>>[];
   if (optionSegments.length == 1) {
     // TODO(sigmund, johnniwinther): change default options now that CPS is
     // deleted.
     // Use default options; comparing SSA and CPS output using the new
     // source information strategy.
+    options.add(commonArguments);
     options.add([Flags.useNewSourceInfo]..addAll(commonArguments));
-    options.add([Flags.useNewSourceInfo]..addAll(commonArguments));
-    throw "missing options: please specify options for the second column";
   } else if (optionSegments.length == 2) {
     // Use alternative options for the second output column.
     options.add(commonArguments);
     options.add(optionSegments[1]..addAll(commonArguments));
   } else {
     // Use specific options for both output columns.
     options.add(optionSegments[1]..addAll(commonArguments));
     options.add(optionSegments[2]..addAll(commonArguments));
   }
 
@@ skipping 701 matching lines @@
   // Add annotations based on trace steps.
   for (TraceStep step in graph.steps) {
     String stepInfo = '${step.id}:${step.kind}:${step.offset}';
     bool added = addSourceLocationsForNode(
         annotationType: AnnotationType.WITH_SOURCE_INFO,
         node: step.node,
         stepInfo: stepInfo);
     if (!added) {
       int offset;
       if (options.contains(Flags.useNewSourceInfo)) {
-        offset = step.offset.subexpressionOffset;
+        offset = step.offset.value;
       } else {
         offset = info.jsCodePositions[step.node].startPosition;
       }
       if (offset != null) {
         addCodeLineAnnotation(
             annotationType: AnnotationType.WITHOUT_SOURCE_INFO,
             codeOffset: offset,
             stepInfo: stepInfo);
       }
     }
@@ skipping 149 matching lines @@
     if (data.annotationType == AnnotationType.WITHOUT_SOURCE_INFO) {
       return new AnnotationData(tag: 'span', properties: {
         'title': annotation.title,
         'class': '${ClassNames.marker} '
             '${data.annotationType.className}'
       });
     }
   }
   return null;
 }