https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55212
--- Comment #227 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> --- (In reply to Kazumoto Kojima from comment #226) > Created attachment 59044 [details] > a patch to fix patch 59034 > > Looks the use of the raw R0 pattern in 59034 confuses the def-use analysis > and RA. > I guess it could be the cause of the segfault in c#225. Thanks, I'll add that patch and try again.