diff options
Diffstat (limited to 'testsuite/tests/indexed-types/should_fail/T2693.hs')
| -rw-r--r-- | testsuite/tests/indexed-types/should_fail/T2693.hs | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/testsuite/tests/indexed-types/should_fail/T2693.hs b/testsuite/tests/indexed-types/should_fail/T2693.hs new file mode 100644 index 0000000000..5b0066e948 --- /dev/null +++ b/testsuite/tests/indexed-types/should_fail/T2693.hs @@ -0,0 +1,11 @@ +{-# LANGUAGE TypeFamilies #-} + +module T2693 where + +type family TFn a :: * + +f :: Maybe () +f = do + let Just x = undefined :: Maybe (TFn a) + let n = fst x + fst x + return () |