Comment # 4 on bug 1204505 from Richard Biener

(In reply to Martin Li������ka from comment #3)
> (In reply to Richard Biener from comment #1)
> > It works with GCC 8.1, it's probably due to C++17 being still experimental
> > in GCC 7.  Nevertheless I have reduced it to the following - Martin, can you
> > bisect a fix?
> 
> Fixed with https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=cffc4a68d759fdca.

Thanks, it cherry-picks fine.  It fixes an unrelated bug though but I verified
it also fixes the unreduced testcase.

I'm doing a regstrap and will queue it for the next update of GCC 7 (those do
not happen very often though).  The fix will be available from devel:gcc
though.