From 4eb93836d04d18f43d8c4360f290a7977d96c468 Mon Sep 17 00:00:00 2001
From: Adam Chlipala <adam@chlipala.net>
Date: Sun, 18 Dec 2011 11:29:13 -0500
Subject: Add a new scoping check for unification variables, to fix a type
 inference bug

---
 src/elab_err.sig | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'src/elab_err.sig')

diff --git a/src/elab_err.sig b/src/elab_err.sig
index a66cf61f..14133d08 100644
--- a/src/elab_err.sig
+++ b/src/elab_err.sig
@@ -35,6 +35,7 @@ signature ELAB_ERR = sig
     datatype kunify_error =
              KOccursCheckFailed of Elab.kind * Elab.kind
            | KIncompatible of Elab.kind * Elab.kind
+           | KScope of Elab.kind * Elab.kind
 
     val kunifyError : ElabEnv.env -> kunify_error -> unit
 
@@ -59,6 +60,7 @@ signature ELAB_ERR = sig
            | TooLifty of ErrorMsg.span * ErrorMsg.span
            | TooUnify of Elab.con * Elab.con
            | TooDeep
+           | CScope of Elab.con * Elab.con
 
     val cunifyError : ElabEnv.env -> cunify_error -> unit
 
-- 
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