when %{!?FOO:} macro is in spec file, rpm causes SIGSEGV.

%{!?FOO: bar} ->OK
%{!?FOO:} ->NG
#{!?FOO:} ->NG  (even in comment)

this patch applied, rpm may work correctly.

--- rpm-3.0.4/lib/macro.c.orig  Sat Feb 19 12:16:29 2000
+++ rpm-3.0.4/lib/macro.c       Sat Feb 19 02:39:08 2000
@@ -1116,7 +1116,7 @@
                if (g && g < ge) {              /* Expand X in %{?f:X} */
                        rc = expandT(mb, g, gn);
                } else
-               if (me->body && *me->body) {    /* Expand %{?f}/%{?f*} */
+               if (me != NULL && me->body && *me->body) {      /* Expand
%{?f}/%{?f*} */
                        rc = expandT(mb, me->body, strlen(me->body));
                }
                s = se;