import PrelNames ( genericTyConNames )
import CmdLineOpts
import UnicodeUtil ( stringToUtf8 )
-import ErrUtils ( dumpIfSet, dumpIfSet_dyn )
+import ErrUtils ( dumpIfSet_dyn )
import Util ( count, lengthIs, isSingleton, lengthExceeds )
import Unique ( Uniquable(..) )
import ListSetOps ( equivClassesByUniq, minusList )