[Bug c++/90764] [10 Regression] internal compiler error in build_deduction_guide, at cp/pt.c:27162

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90764

--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Started with r270765.