[libcxx-commits] [libcxx] [libc++] Fix strict aliasing violation for `deque::const_iterator` (PR #136067)

[Nikolas Klauser via libcxx-commits]

================
@@ -459,8 +470,9 @@ private:
       __deque_iterator<_ValueType, _Pointer, _Reference, _MapPointer, _DiffType, _BlockSize>;
 
 public:
-  using __segment_iterator _LIBCPP_NODEBUG = _MapPointer;
-  using __local_iterator _LIBCPP_NODEBUG   = _Pointer;
+  using __segment_iterator _LIBCPP_NODEBUG =
+      __rebind_pointer_t<_Pointer, const __rebind_pointer_t<_Pointer, _ValueType> >;
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philnik777 wrote:

```suggestion
  using __segment_iterator _LIBCPP_NODEBUG = typename _Iterator::__map_iterator;
```

https://github.com/llvm/llvm-project/pull/136067