From 16be85933ffaf8c08523e4c02f754ee496593cf8 Mon Sep 17 00:00:00 2001
From: Enrico Tassi
Date: Tue, 21 Aug 2018 13:07:36 +0200
Subject: [ssr] anomaly -> error (Fix #8253)

Looks like this bug was introduced when unification started raising the
UnableToUnify exception in 8ac929ea128f1f7353b3f4d532b642e769542e55 .
I now turn this exception into a PretypeError that is correctly catched
and printed.
---
 plugins/ssrmatching/ssrmatching.ml | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'plugins')

diff --git a/plugins/ssrmatching/ssrmatching.ml b/plugins/ssrmatching/ssrmatching.ml
index 30a998c6ce..20ea8b3667 100644
--- a/plugins/ssrmatching/ssrmatching.ml
+++ b/plugins/ssrmatching/ssrmatching.ml
@@ -291,7 +291,10 @@ let unif_EQ_args env sigma pa a =
   prof_unif_eq_args.profile (unif_EQ_args env sigma pa) a 
 ;;
 
-let unif_HO env ise p c = Evarconv.the_conv_x env p c ise
+let unif_HO env ise p c =
+  try Evarconv.the_conv_x env p c ise
+  with Evarconv.UnableToUnify(ise, err) ->
+    raise Pretype_errors.(PretypeError(env,ise,CannotUnify(p,c,Some err)))
 
 let unif_HO_args env ise0 pa i ca =
   let n = Array.length pa in
-- 
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