Another fix for debugging stack traces and captured variables.

runtime/vm/compiler.cc

 // Copyright (c) 2012, 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.
 
 #include "vm/compiler.h"
 
 #include "vm/assembler.h"
 
 #include "vm/ast_printer.h"
 #include "vm/code_generator.h"
@@ skipping 426 matching lines @@
             function_fullname);
   const LocalVarDescriptors& var_descriptors =
       LocalVarDescriptors::Handle(code.var_descriptors());
   intptr_t var_desc_length =
       var_descriptors.IsNull() ? 0 : var_descriptors.Length();
   String& var_name = String::Handle();
   for (intptr_t i = 0; i < var_desc_length; i++) {
     var_name = var_descriptors.GetName(i);
     RawLocalVarDescriptors::VarInfo var_info;
     var_descriptors.GetInfo(i, &var_info);
-    if (var_info.kind == RawLocalVarDescriptors::kContextChain) {
-      OS::Print("  saved CTX reg offset %"Pd"\n", var_info.index);
+    if (var_info.kind == RawLocalVarDescriptors::kSavedCallerContext) {
+      OS::Print("  saved caller's CTX reg offset %"Pd"\n", var_info.index);
+    } else if (var_info.kind == RawLocalVarDescriptors::kSavedCurrentContext) {
+      OS::Print("  saved current CTX reg offset %"Pd"\n", var_info.index);
     } else {
       if (var_info.kind == RawLocalVarDescriptors::kContextLevel) {
         OS::Print("  context level %"Pd" scope %d",
                   var_info.index, var_info.scope_id);
       } else if (var_info.kind == RawLocalVarDescriptors::kStackVar) {
         OS::Print("  stack var '%s' offset %"Pd"",
                   var_name.ToCString(), var_info.index);
       } else {
         ASSERT(var_info.kind == RawLocalVarDescriptors::kContextVar);
         OS::Print("  context var '%s' level %d offset %"Pd"",
@@ skipping 235 matching lines @@
       Object::Handle(isolate->object_store()->sticky_error());
     isolate->object_store()->clear_sticky_error();
     isolate->set_long_jump_base(base);
     return result.raw();
   }
   UNREACHABLE();
   return Object::null();
 }
 
 }  // namespace dart