diff options
Diffstat (limited to 'testsuite/tests/linear/should_fail/LinearRole.hs')
| -rw-r--r-- | testsuite/tests/linear/should_fail/LinearRole.hs | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/testsuite/tests/linear/should_fail/LinearRole.hs b/testsuite/tests/linear/should_fail/LinearRole.hs new file mode 100644 index 0000000000..403935f4ce --- /dev/null +++ b/testsuite/tests/linear/should_fail/LinearRole.hs @@ -0,0 +1,12 @@ +{-# LANGUAGE LinearTypes, GADTs, DataKinds #-} + +module LinearRole where -- #18799 + +import GHC.Types (Multiplicity(..)) +import Data.Coerce + +data T m a where + MkT :: a %m -> T m a + +f :: T 'One a -> T 'Many a +f x = coerce x |