[Bug c++/89036] [8/9 Regression] ICE if destructor has a requires

[dmalcolm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89036

--- Comment #3 from David Malcolm <dmalcolm at gcc dot gnu.org> ---
Candidate patch: https://gcc.gnu.org/ml/gcc-patches/2019-01/msg01513.html