diff options
Diffstat (limited to 'testsuite/tests/typecheck/should_compile/tc148.hs')
| -rw-r--r-- | testsuite/tests/typecheck/should_compile/tc148.hs | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/testsuite/tests/typecheck/should_compile/tc148.hs b/testsuite/tests/typecheck/should_compile/tc148.hs new file mode 100644 index 0000000000..c66f723550 --- /dev/null +++ b/testsuite/tests/typecheck/should_compile/tc148.hs @@ -0,0 +1,12 @@ +{-# LANGUAGE Rank2Types #-} + +-- This program tickled a bug in 5.02.2's forall-lifting + +module ShouldCompile where + +class Class x where + combinator' :: (forall y. Class y => y -> y) -> x -> x + +combinator :: (forall y. Class y => y -> y) + -> (forall x. Class x => x -> x) +combinator f = combinator' f |