# HG changeset patch
# User wenzelm
# Date 1014920594 -3600
# Node ID 8f717cbd4e44a1e839b74e2a6a1fe357046a3ca5
# Parent  4c76bce4ce391d6e2b8e938ccf65925279426aaf
rewrite_term: Term.rename_abs;

diff -r 4c76bce4ce39 -r 8f717cbd4e44 src/Pure/pattern.ML
--- a/src/Pure/pattern.ML	Thu Feb 28 19:22:56 2002 +0100
+++ b/src/Pure/pattern.ML	Thu Feb 28 19:23:14 2002 +0100
@@ -420,7 +420,8 @@
       in (fn u => Abs (x, T, abstract_over (Free (x', T), u)), t') end;
 
     fun match_rew tm (tm1, tm2) =
-      Some (subst_vars (match tsig (tm1, tm)) tm2) handle MATCH => None;
+      Some (subst_vars (match tsig (tm1, tm)) (if_none (Term.rename_abs tm1 tm tm2) tm2))
+        handle MATCH => None;
     fun rew (Abs (_, _, body) $ t) = Some (subst_bound (t, body))
       | rew tm = get_first (match_rew tm) rules;