https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112348
Bug ID: 112348
Summary: [C++23] defect in struct
hash<basic_stacktrace<_Allocator>>
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: vincenzo.innocente at cern dot ch
Target Milestone: ---
gcc version 14.0.0 20231028 (experimental) [master r14-4988-g5d2a360f0a5] (GCC)
auto k = std::hash<std::stacktrace>()(std::stacktrace::current());
does not compile to me with error
In instantiation of 'std::size_t std::hash<std::basic_stacktrace<_Allocator>
>::operator()(const std::basic_stacktrace<_Allocator>&) const [with _Allocator
= std::allocator<std::stacktrace_entry>; std::size_t = long unsigned int]':
testStacktrace.cpp:39:41: required from here
39 | auto k = std::hash<std::stacktrace>()(std::stacktrace::current());
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/afs/cern.ch/work/i/innocent/public/w5/include/c++/14.0.0/stacktrace:803:49:
error: no match for call to '(std::hash<long unsigned int>) (const
std::stacktrace_entry&)'
803 | __val = _Hash_impl::__hash_combine(__h(__f), __val);
| ~~~^~~~~
changed
// hash<stacktrace_entry::native_handle_type> __h;
hash<stacktrace_entry> __h;
and it compiled.
(I suspect __f.native_handle() would work as well)
Surprised it passed tests.
