diff options
Diffstat (limited to 'testsuite/tests/typecheck/should_fail/tcfail174.hs')
| -rw-r--r-- | testsuite/tests/typecheck/should_fail/tcfail174.hs | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/testsuite/tests/typecheck/should_fail/tcfail174.hs b/testsuite/tests/typecheck/should_fail/tcfail174.hs new file mode 100644 index 0000000000..47c63d7248 --- /dev/null +++ b/testsuite/tests/typecheck/should_fail/tcfail174.hs @@ -0,0 +1,17 @@ +{-# OPTIONS -XImpredicativeTypes #-} + +module Foo where + +data Capture a = Base a + | Capture (Capture (forall x . x -> a)) + +g :: Capture (forall a . a -> a) +g = Base id -- Fails; need a rigid signature on 'id' + +-- This function should definitely be rejected, with or without type signature + +h1 = Capture g + +h2 :: Capture b +h2 = Capture g + |