(not for review yet)

base/memory/scoped_ptr.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Scopers help you manage ownership of a pointer, helping you easily manage the
 // a pointer within a scope, and automatically destroying the pointer at the
 // end of a scope.  There are two main classes you will use, which correspond
 // to the operators new/delete and new[]/delete[].
 //
 // Example usage (scoped_ptr<T>):
@@ skipping 81 matching lines @@
 
 #include <assert.h>
 #include <stddef.h>
 #include <stdlib.h>
 
 #include <algorithm>  // For std::swap().
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/move.h"
+#include "base/logging.h"
 #include "base/template_util.h"
 
 namespace base {
 
 namespace subtle {
 class RefCountedBase;
 class RefCountedThreadSafeBase;
 }  // namespace subtle
 
 // Function object which deletes its parameter, which must be a pointer.
@@ skipping 254 matching lines @@
   // Then takes ownership of a new object, if given.
   void reset(element_type* p = NULL) { impl_.reset(p); }
 
   // Accessors to get the owned object.
   // operator* and operator-> will assert() if there is no current object.
   element_type& operator*() const {
     assert(impl_.get() != NULL);
     return *impl_.get();
   }
   element_type* operator->() const  {
+    CHECK(impl_.get() != NULL);
     assert(impl_.get() != NULL);
     return impl_.get();
   }
   element_type* get() const { return impl_.get(); }
 
   // Access to the deleter.
   deleter_type& get_deleter() { return impl_.get_deleter(); }
   const deleter_type& get_deleter() const { return impl_.get_deleter(); }
 
   // Allow scoped_ptr<element_type> to be used in boolean expressions, but not
@@ skipping 314 matching lines @@
 
 // A function to convert T* into scoped_ptr<T>
 // Doing e.g. make_scoped_ptr(new FooBarBaz<type>(arg)) is a shorter notation
 // for scoped_ptr<FooBarBaz<type> >(new FooBarBaz<type>(arg))
 template <typename T>
 scoped_ptr<T> make_scoped_ptr(T* ptr) {
   return scoped_ptr<T>(ptr);
 }
 
 #endif  // BASE_MEMORY_SCOPED_PTR_H_