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}