Test Trac #10156

2 files changed, 16 insertions, 0 deletions

diff --git a/testsuite/tests/typecheck/should_compile/T10156.hs b/testsuite/tests/typecheck/should_compile/T10156.hs
new file mode 100644
index 0000000000..d452122109
--- /dev/null
+++ b/testsuite/tests/typecheck/should_compile/T10156.hs
@@ -0,0 +1,15 @@
+{-# LANGUAGE FlexibleContexts, TypeFamilies #-}
+
+module T10156 where
+
+import Data.Coerce
+
+data Iso a b = Iso (a -> b) (b -> a)
+
+coerceIso :: Coercible a b => Iso a b
+coerceIso = Iso coerce coerce
+
+type family F x
+
+f :: (Coercible a (F b), Coercible c (F b)) => a -> b -> c
+f x _ = coerce x
diff --git a/testsuite/tests/typecheck/should_compile/all.T b/testsuite/tests/typecheck/should_compile/all.T
index 7b3fb9f981..a4b497e993 100644
--- a/testsuite/tests/typecheck/should_compile/all.T
+++ b/testsuite/tests/typecheck/should_compile/all.T
@@ -443,3 +443,4 @@ test('T9971', normal, compile, [''])
 test('T10031', normal, compile, [''])
 test('T10072', normal, compile_fail, [''])
 test('T10100', normal, compile, [''])
+test('T10156', normal, compile, [''])