https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119025
Bug ID: 119025
Summary: libiberty fails demangling some template function
names
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ofekshilon at gmail dot com
Target Milestone: ---
[Migrated from binutils issue
https://sourceware.org/bugzilla/show_bug.cgi?id=32408]
`fun` from this c++ snippet:
```
#include <cstdio>
#include <concepts>
template <std::integral I>
void fun(I i)
{
std::puts("foo<std::integral>()");
}
```
is mangled by gcc to `_Z3funITkSt8integralcEvT_`, and c++filt fails to demangle
it:
$ c++filt _Z3funITkSt8integralcEvT_
_Z3funITkSt8integralcEvT_
As another variation, when such a template is a specialization of a more
general one - the mangled name has an additional suffix
(_Z3funITkSt8integralcEvT_.isra.0) - and c++filt fails to demangle it too.
Here: https://godbolt.org/z/4jMKqjcnc
According to an initial investigation on the binutils side, the root cause is
within libiberty itself.
