Fire 'stack' getter of error objects after GC.

src/list-inl.h

 // Copyright 2006-2009 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 67 matching lines @@
   // Since the element reference could be an element of the list, copy
   // it out of the old backing storage before resizing.
   T temp = element;
   Resize(new_capacity, alloc);
   data_[length_++] = temp;
 }
 
 
 template<typename T, class P>
 void List<T, P>::Resize(int new_capacity, P alloc) {
+  ASSERT_LE(length_, new_capacity);
   T* new_data = NewData(new_capacity, alloc);
-  memcpy(new_data, data_, capacity_ * sizeof(T));
+  memcpy(new_data, data_, length_ * sizeof(T));
   List<T, P>::DeleteData(data_);
   data_ = new_data;
   capacity_ = new_capacity;
 }
 
 
 template<typename T, class P>
 Vector<T> List<T, P>::AddBlock(T value, int count, P alloc) {
   int start = length_;
   for (int i = 0; i < count; i++) Add(value, alloc);
@@ skipping 55 matching lines @@
 }
 
 
 template<typename T, class P>
 void List<T, P>::Rewind(int pos) {
   length_ = pos;
 }
 
 
 template<typename T, class P>
+void List<T, P>::Trim(P alloc) {
+  if (length_ < capacity_ / 4) {
+    Resize(capacity_ / 2, alloc);
+  }
+}
+
+
+template<typename T, class P>
 void List<T, P>::Iterate(void (*callback)(T* x)) {
   for (int i = 0; i < length_; i++) callback(&data_[i]);
 }
 
 
 template<typename T, class P>
 template<class Visitor>
 void List<T, P>::Iterate(Visitor* visitor) {
   for (int i = 0; i < length_; i++) visitor->Apply(&data_[i]);
 }
@@ skipping 81 matching lines @@
 
 template <typename T>
 int SortedListBSearch(const List<T>& list, T elem) {
   return SortedListBSearch<T, ElementCmp<T> > (list, ElementCmp<T>(elem));
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_LIST_INL_H_