From a512c03be02ff749abc2328b17fd7917d54aff27 Mon Sep 17 00:00:00 2001
From: ppedrot
Date: Mon, 29 Jul 2013 16:35:50 +0000
Subject: Tentative fix for #3054: we refresh universes in a term generated by
 congruence, as it seems to be done methodically on the remaining of this
 plugin.

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@16642 85f007b7-540e-0410-9357-904b9bb8a0f7
---
 plugins/cc/ccalgo.ml                        |  3 ++-
 test-suite/bugs/closed/shouldsucceed/3054.v | 10 ++++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)
 create mode 100644 test-suite/bugs/closed/shouldsucceed/3054.v

diff --git a/plugins/cc/ccalgo.ml b/plugins/cc/ccalgo.ml
index aba908d482..fbe31fe527 100644
--- a/plugins/cc/ccalgo.ml
+++ b/plugins/cc/ccalgo.ml
@@ -427,7 +427,8 @@ let rec add_term state t=
     try Termhash.find uf.syms t with
 	Not_found ->
 	  let b=next uf in
-	  let typ = pf_type_of state.gls (constr_of_term t) in
+          let trm = Termops.refresh_universes (constr_of_term t) in
+	  let typ = pf_type_of state.gls trm in
 	  let typ = canonize_name typ in
 	  let new_node=
 	    match t with
diff --git a/test-suite/bugs/closed/shouldsucceed/3054.v b/test-suite/bugs/closed/shouldsucceed/3054.v
new file mode 100644
index 0000000000..936e58e197
--- /dev/null
+++ b/test-suite/bugs/closed/shouldsucceed/3054.v
@@ -0,0 +1,10 @@
+Section S.
+
+Let V := Type.
+
+Goal ~ true = false.
+Proof.
+congruence.
+Qed.
+
+End S.
-- 
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