Add ASSERTs to all calls of nameModule

[ghc-hetmet.git] / compiler / types / Generics.lhs

diff --git a/compiler/types/Generics.lhs b/compiler/types/Generics.lhs
index c0fb4fc..01632d3 100644 (file)
--- a/compiler/types/Generics.lhs
+++ b/compiler/types/Generics.lhs
@@ -398,7 +398,7 @@ mkGenericNames tycon
   where
     tc_name  = tyConName tycon
     tc_occ   = nameOccName tc_name
-    tc_mod   = nameModule tc_name
+    tc_mod   = ASSERT( isExternalName tc_name ) nameModule tc_name
     from_RDR = mkOrig tc_mod (mkGenOcc1 tc_occ)
     to_RDR   = mkOrig tc_mod (mkGenOcc2 tc_occ)
 \end{code}