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diff src/elaborate.sml @ 341:389399d65331

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Crud update form
author Adam Chlipala <adamc@hcoop.net>
date Sun, 14 Sep 2008 19:03:55 -0400
parents 075b36dbb1a4
children b85e6ba56618
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line diff
--- a/src/elaborate.sml	Sun Sep 14 15:20:53 2008 -0400
+++ b/src/elaborate.sml	Sun Sep 14 19:03:55 2008 -0400
@@ -1321,7 +1321,9 @@
                               | SOME (_, cons) => dtype cons
                         end
                       | L'.CError => (true, gs)
-                      | _ => raise Fail "isTotal: Not a datatype"
+                      | c =>
+                        (prefaces "Not a datatype" [("c", p_con env (c, ErrorMsg.dummySpan))];
+                         raise Fail "isTotal: Not a datatype")
                 end
               | Record _ => (List.all (fn c2 => coverageImp (c, c2)) (enumerateCases t), [])
     in