[Bug c++/87269] [9 Regression] ICE in tsubst_copy, at cp/pt.c:15475 starting from r261802

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87269

--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
I can still see it iceing:
https://godbolt.org/z/tvHnzW

Can you please also try the duplicate?