[Bug middle-end/86284] Insert trap instruction in place of missing return statement on dodgy code

[sjames at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86284

--- Comment #7 from Sam James <sjames at gcc dot gnu.org> ---
(and for C, I think we have another bug for this, but it's very hard to do.)