https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120686
Alex <waffl3x at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
See Also| |https://github.com/itanium-
| |cxx-abi/cxx-abi/issues/175
--- Comment #3 from Alex <waffl3x at gcc dot gnu.org> ---
https://godbolt.org/z/Wc3dYWzhP
```
template<typename... Args>
Args...[0] f() { return {}; }
void g() { f<int>(); }
```
<source>: In instantiation of 'Args ...[0] f() [with Args = {int}]':
<source>:2:12: sorry, unimplemented: mangling type pack index
2 | Args...[0] f() { return {}; }
| ^
Unfortunately it looks like this is related to an ongoing ABI issue so
I won't be looking at fixing it for now. We don't emit the sorry for
this case and we certainly shouldn't be ICEing so it's still a distinct
bug IMO.
I'm reluctant to say this as there might be subtle differences, but I
believe specifying `auto&&` for the return type should be a sufficient
workaround.
