Your bug appears to be fixed in 4.18 (and probably 5.0 as well), at
least according to some checks I did - I backed out from a 4.18 tree we
have here a change that adds some "check_typedef()" calls in
"valarith.c", to see whether those were a fix, and rebuild GDB, and the
resulting GDB still appears to print "{a,b,c,d}+1" correctly.
Try it with 4.18 or 5.0; if the bug is still present, try applying the
patch in the message to "gdb-patches" at
http://sourceware.cygnus.com/ml/gdb-patches/2000-05/msg00407.html
(that's the change I referred to above).
