Pass handles not raw objects into methods.

runtime/vm/dart_entry.cc

Index: runtime/vm/dart_entry.cc
===================================================================
--- runtime/vm/dart_entry.cc	(revision 15741)
+++ runtime/vm/dart_entry.cc	(working copy)
@@ -119,8 +119,8 @@
 }
 
 
-ArgumentsDescriptor::ArgumentsDescriptor(RawObject* array)
-    : array_(Array::CheckedHandle(array)) {
+ArgumentsDescriptor::ArgumentsDescriptor(const Array& array)
+    : array_(array) {
 }
 
 
@@ -134,10 +134,12 @@
 }
 
 
-RawObject* ArgumentsDescriptor::NameAt(intptr_t index) const {
-  return array_.At(kFirstNamedEntryIndex +
-                   (index * kNamedEntrySize) +
-                   kNameOffset);
+RawString* ArgumentsDescriptor::NameAt(intptr_t index) const {
+  String& result = String::Handle();
+  result ^= array_.At(kFirstNamedEntryIndex +
+                      (index * kNamedEntrySize) +
+                      kNameOffset);

[siva, 2012/12/05 19:18:48]

const String& result = String::CheckedHandle(array_At(...));
return result.raw();

maybe ?

[srdjan, 2012/12/05 19:30:07]

Discussed, ignoring.

+  return result.raw();
 }