https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96414
Bug ID: 96414 Summary: Second char relation test incorrect with constexpr dynamic allocation Product: gcc Version: 11.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: pkeir at outlook dot com Target Milestone: --- Created attachment 48981 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48981&action=edit The file containing the code described. The attached C++20 code behaves differently at compile-time than at runtime, but shouldn't. As with `__gnu_cxx::char_traits<char>::lt`, the function `lt_fun` applies built-in `operator<` to two character references, and returns the result as an `int`. However, with the character pointer `pc` pointing to memory allocated dynamically, the second call returns true (1) indicating that 'a' < 'a' is true. This is demonstrated by a failing static assert. Commenting out the static assert produces an executable which correctly reports that 'a' < 'a' is false; by returning a 0.