I upgraded to the 20.7-43 Rawhide emacs packages (emacs, emacs-X11,
emacs-el).  Now Emacs is coredumping when I try to run it in X mode:

Program received signal SIGSEGV, Segmentation fault.
0x4009384e in XtInitializeWidgetClass () from /usr/X11R6/lib/libXt.so.6
(gdb) where
#0  0x4009384e in XtInitializeWidgetClass () from /usr/X11R6/lib/libXt.so.6
#1  0x40094304 in _XtCreateWidget () from /usr/X11R6/lib/libXt.so.6
#2  0x400944ed in XtCreateWidget () from /usr/X11R6/lib/libXt.so.6
#3  0x08090d25 in XMapRaised ()
#4  0x08091d1e in XMapRaised ()
#5  0x080f4b40 in error ()
#6  0x0811e56d in error ()
#7  0x080f5167 in error ()
#8  0x080f4c78 in error ()
#9  0x0811e56d in error ()
#10 0x080f5167 in error ()
#11 0x080f4c78 in error ()
#12 0x0811e56d in error ()
#13 0x080f5167 in error ()
#14 0x080f4c78 in error ()
#15 0x0811e56d in error ()
#16 0x080f5167 in error ()
#17 0x080f4c78 in error ()
#18 0x0811e56d in error ()
#19 0x080f5167 in error ()
#20 0x080f4ebf in error ()
#21 0x080f3f3c in error ()
#22 0x0809ade2 in abort ()
#23 0x080f2cba in re_compile_pattern ()
#24 0x0809ae1b in abort ()
#25 0x080f283e in re_compile_pattern ()
#26 0x0809ad1a in abort ()
#27 0x0809a941 in abort ()
#28 0x0809aa4d in abort ()
#29 0x08099a97 in abort ()
#30 0x40265306 in __libc_start_main (main=0x8098f00 <abort+1408>, argc=1, 
    ubp_av=0xbffff984, init=0x804c864 <_init>, fini=0x812fba0 <_fini>, 
    rtld_fini=0x4000d2cc <_dl_fini>, stack_end=0xbffff97c)
    at ../sysdeps/generic/libc-start.c:129
(gdb) 

I downloaded the SRPM and rebuilt it, and it doesn't coredump anymore.  I
suspect a problem in the binutils used to build the Emacs RPM, especially
since there's at least one known problem in the current rawhide binutils. 
I'm running a previous binutils version (2.11.90.0.8-8) because I ran into
that problem.  Other than that old binutils version, I'm up-to-date with
all the other Rawhide packages.