X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fmatita%2FmatitaSync.ml;h=f42dad76927cb693cf15c8537a95d326b750103e;hb=08791e80816548121e81e04d3ead8c9a5171d033;hp=29e19c690ea20744954a79b4bdcc260d007d6324;hpb=cb408b9ea336cd8efb990f7a1c88b566ccf0bd2e;p=helm.git

diff --git a/helm/matita/matitaSync.ml b/helm/matita/matitaSync.ml
index 29e19c690..f42dad769 100644
--- a/helm/matita/matitaSync.ml
+++ b/helm/matita/matitaSync.ml
@@ -34,7 +34,16 @@ let alias_diff ~from status =
        if not (Map.mem domain_item from.aliases) then
          Map.add domain_item codomain_item acc
        else
-         acc)
+         begin
+           try 
+             let description1 = fst(Map.find domain_item from.aliases) in
+             let description2 = fst(Map.find domain_item status.aliases) in
+             if description1 <> description2 then
+               Map.add domain_item codomain_item acc
+             else
+               acc 
+           with Not_found -> acc
+         end)
     status.aliases Map.empty
 
 let set_proof_aliases status aliases =