# HG changeset patch
# Parent 7cce656061311e24fdae0990ed4f7de931d88c76

diff -r 7cce65606131 Lib/sre_parse.py
--- a/Lib/sre_parse.py	Thu Apr 08 11:43:51 2010 +0300
+++ b/Lib/sre_parse.py	Thu Apr 08 11:49:56 2010 +0300
@@ -557,7 +557,7 @@
                             raise error, "bad character in group name"
                         gid = state.groupdict.get(name)
                         if gid is None:
-                            raise error, "unknown group name"
+                            raise error, "unknown group name '%s'" % name
                         subpatternappend((GROUPREF, gid))
                         continue
                     else:
@@ -608,7 +608,7 @@
                     if isname(condname):
                         condgroup = state.groupdict.get(condname)
                         if condgroup is None:
-                            raise error, "unknown group name"
+                            raise error, "unknown group name '%s'" % condname
                     else:
                         try:
                             condgroup = int(condname)
@@ -734,7 +734,7 @@
                     try:
                         index = pattern.groupindex[name]
                     except KeyError:
-                        raise IndexError, "unknown group name"
+                        raise IndexError, "unknown group name '%s'" % name
                 a((MARK, index))
             elif c == "0":
                 if s.next in OCTDIGITS: