--- src/dfa.c.orig 2005-05-11 09:45:10.000000000 -0700
+++ src/dfa.c 2005-05-11 09:46:50.000000000 -0700
@@ -1065,7 +1065,7 @@
if (!match) {
dfaerror(_("invalid collating element or class"));
} else {
- if (*match && !match[1]) {
+ if (*match && !match[1] && *match != ']') {
c1 = *match;
lexptr += used;
lexleft -= used;
@@ -1122,6 +1122,7 @@
char *match = try_collating_thing(lexptr, lexleft, &used);
if (match && *match && !match[1]) {
c2 = *match;
+ backslash = *match == ']';
lexptr += used;
lexleft -= used;
}