mkImpossibleExpr :: Type -> CoreExpr
mkImpossibleExpr res_ty
  = mkRuntimeErrorApp rUNTIME_ERROR_ID res_ty "Impossible case alternative"
mkImpossibleExpr :: Type -> CoreExpr
mkImpossibleExpr res_ty
  = mkRuntimeErrorApp rUNTIME_ERROR_ID res_ty "Impossible case alternative"
mkImpossibleExpr res_ty
  = mkRuntimeErrorApp rUNTIME_ERROR_ID res_ty "Impossible case alternative"