From 9de1edd730eeb3cada742a27a36bc70178eda6d8 Mon Sep 17 00:00:00 2001
From: Matthieu Sozeau
Date: Wed, 17 Sep 2014 11:42:05 +0200
Subject: While resolving typeclass evars in clenv, touch only the ones that
 appear in the clenv's value and type, ensuring we don't try to solve
 unrelated goals (fixes bug#3633).

---
 test-suite/bugs/closed/3633.v | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 test-suite/bugs/closed/3633.v

(limited to 'test-suite/bugs')

diff --git a/test-suite/bugs/closed/3633.v b/test-suite/bugs/closed/3633.v
new file mode 100644
index 0000000000..6f89ef6db7
--- /dev/null
+++ b/test-suite/bugs/closed/3633.v
@@ -0,0 +1,21 @@
+Set Typeclasses Strict Resolution.
+Class Contr (A : Type) := { center : A }.
+Definition foo {A} `{Contr A} : A.
+Proof.
+  apply center.
+  Undo.
+  (* Ensure the constraints are solved indepentently, otherwise a frozen ?A 
+  makes a search for Contr ?A fail when finishing to apply (fun x => x) *)
+  apply (fun x => x), center. 
+
+(* Toplevel input, characters 7-17:
+Error:
+Unable to satisfy the following constraints:
+In environment:
+A : Type
+H : Contr A
+
+?A : "Type"
+?Contr : "Contr ?X8"
+
+ *)
\ No newline at end of file
-- 
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