Reapply "[libc++] Fix incorrect down cast in __tree::operator="

philnik777 · philnik777 · commit d1b31596dcc0 · 2025-08-06T12:30:32.000+02:00
This reverts commit 5499a70.
diff --git a/libcxx/include/__tree b/libcxx/include/__tree
@@ -1388,7 +1388,7 @@ __tree<_Tp, _Compare, _Allocator>& __tree<_Tp, _Compare, _Allocator>::operator=(
     if (__root())
       __root()->__parent_ = __end_node();
   }
-  __begin_node_ = static_cast<__end_node_pointer>(std::__tree_min(static_cast<__node_base_pointer>(__end_node())));
+  __begin_node_ = static_cast<__end_node_pointer>(std::__tree_min(__end_node()->__left_));
   __size_       = __t.size();
 
   return *this;

Original file line number	Diff line number	Diff line change
`@@ -1388,7 +1388,7 @@ __tree<_Tp, _Compare, _Allocator>& __tree<_Tp, _Compare, _Allocator>::operator=(`
`1388`	`1388`	`if (__root())`
`1389`	`1389`	`__root()->__parent_ = __end_node();`
`1390`	`1390`	`}`
`1391`		`- __begin_node_ = static_cast<__end_node_pointer>(std::__tree_min(static_cast<__node_base_pointer>(__end_node())));`
	`1391`	`+ __begin_node_ = static_cast<__end_node_pointer>(std::__tree_min(__end_node()->__left_));`
`1392`	`1392`	`__size_ = __t.size();`
`1393`	`1393`
`1394`	`1394`	`return *this;`