diff options
| -rw-r--r-- | compiler/typecheck/TcPat.lhs | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/compiler/typecheck/TcPat.lhs b/compiler/typecheck/TcPat.lhs index 82ac5e3596..23e6bbf819 100644 --- a/compiler/typecheck/TcPat.lhs +++ b/compiler/typecheck/TcPat.lhs @@ -365,8 +365,7 @@ tc_pat pstate lpat@(LazyPat pat) pat_ty thing_inside -- getLIE/extendLIEs: see Note [Hopping the LIE in lazy patterns] -- Check no existentials - ; if (null pat_tvs) then return () - else lazyPatErr lpat pat_tvs + ; unless (null pat_tvs) $ lazyPatErr lpat pat_tvs -- Check that the pattern has a lifted type ; pat_tv <- newBoxyTyVar liftedTypeKind |