[Bug bootstrap/78390] [7 Regression] Bootstrap failure: match.pd: cannot determine type of operand

[matz at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78390

--- Comment #15 from Michael Matz <matz at gcc dot gnu.org> ---
(In reply to Dominik Vogt from comment #14)
> With the fix I couldn't reproduce the error message in four attempts, but
> genattrtab still hangs.  Maybe this is bad luck, but maybe the error is
> gone.  Running a regression test without bootstrapping on s390x,
> --with-arch=zEC12, --languages=c, there is a long list of tests that fail:
> 
>  Running target unix/-m64
> +FAIL: gcc.c-torture/execute/20030408-1.c   -O1  execution test

Okay, I can reproduce this now.  Looking...