Fix an off-by-one error in the stack frame iteration.

runtime/vm/object.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/object.h"
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/bigint_operations.h"
@@ skipping 7095 matching lines @@
       node_ids->Add(node_id);
       ic_data_obj = CodePatcher::GetInstanceCallIcDataAt(descriptors.PC(i));
       ic_data_objs.Add(ic_data_obj);
     }
   }
   return max_id;
 }
 
 
 RawStackmap* Code::GetStackmap(uword pc, Array* maps, Stackmap* map) const {
-  // This code is used only during iterating frames during a GC and hence
-  // it should not in turn start a GC.
+  // This code is used during iterating frames during a GC and hence it
+  // should not in turn start a GC.
   NoGCScope no_gc;
   if (stackmaps() == Array::null()) {
     // No stack maps are present in the code object which means this
     // frame relies on tagged pointers.
     return Stackmap::null();
   }
   // A stack map is present in the code object, use the stack map to visit
   // frame slots which are marked as having objects.
   *maps = stackmaps();
   *map = Stackmap::null();
@@ skipping 3723 matching lines @@
   const String& str = String::Handle(pattern());
   const char* format = "JSRegExp: pattern=%s flags=%s";
   intptr_t len = OS::SNPrint(NULL, 0, format, str.ToCString(), Flags());
   char* chars = reinterpret_cast<char*>(
       Isolate::Current()->current_zone()->Allocate(len + 1));
   OS::SNPrint(chars, (len + 1), format, str.ToCString(), Flags());
   return chars;
 }
 
 }  // namespace dart