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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/95797] Can std::allocator.deallocate newed pointer during
 constant evaluation
Date: Sun, 29 Aug 2021 00:36:18 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95797

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to work|11.0                        |

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Clang has specific code to catch this:
<source>:4:5: error: static_assert expression is not an integral constant
expression
    (std::allocator<int>{}.deallocate(new int, 1),
    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/opt/compiler-explorer/clang-trunk-20210828/bin/../include/c++/v1/__memory/=
allocator.h:112:13:
note: 'std::allocator<...>::deallocate' used to delete pointer to object
allocated with 'new'
            ::operator delete(__p);
            ^
<source>:4:28: note: in call to '&std::allocator<int>{}->deallocate(&{*new
int#0}, 1)'
    (std::allocator<int>{}.deallocate(new int, 1),
                           ^
<source>:4:39: note: heap allocation performed here
    (std::allocator<int>{}.deallocate(new int, 1),
                                      ^=