diff options
| -rw-r--r-- | testsuite/tests/typecheck/should_compile/T10423.hs | 9 | ||||
| -rw-r--r-- | testsuite/tests/typecheck/should_compile/all.T | 1 |
2 files changed, 10 insertions, 0 deletions
diff --git a/testsuite/tests/typecheck/should_compile/T10423.hs b/testsuite/tests/typecheck/should_compile/T10423.hs new file mode 100644 index 0000000000..5a8ff0251f --- /dev/null +++ b/testsuite/tests/typecheck/should_compile/T10423.hs @@ -0,0 +1,9 @@ +{-# LANGUAGE FlexibleInstances, TypeFamilies, MultiParamTypeClasses #-} + +module T10423 where + +class Monad m => Testable m a + +newtype Prop m = MkProp (m Int) + +instance (Monad m, m ~ n) => Testable n (Prop m) diff --git a/testsuite/tests/typecheck/should_compile/all.T b/testsuite/tests/typecheck/should_compile/all.T index 2f257eafee..12e26128bc 100644 --- a/testsuite/tests/typecheck/should_compile/all.T +++ b/testsuite/tests/typecheck/should_compile/all.T @@ -456,3 +456,4 @@ test('T10009', normal, compile, ['']) test('T10390', normal, compile, ['']) test('T8555', normal, compile, ['']) test('T8799', normal, compile, ['']) +test('T10423', normal, compile, ['']) |