testsuite: add test for #10177

Signed-off-by: Austin Seipp <austin@well-typed.com>

2 files changed, 11 insertions, 0 deletions

diff --git a/testsuite/tests/typecheck/should_compile/T10177.hs b/testsuite/tests/typecheck/should_compile/T10177.hs
new file mode 100644
index 0000000000..fd84396f67
--- /dev/null
+++ b/testsuite/tests/typecheck/should_compile/T10177.hs
@@ -0,0 +1,10 @@
+{-# LANGUAGE PolyKinds #-}
+{-# LANGUAGE FlexibleContexts #-}
+module T10177 where
+
+import Data.Typeable
+
+newtype V n a = V [a]
+
+class    Typeable a                   => C a
+instance (Typeable (V n), Typeable a) => C (V n a)
diff --git a/testsuite/tests/typecheck/should_compile/all.T b/testsuite/tests/typecheck/should_compile/all.T
index a4b497e993..d4e71c709e 100644
--- a/testsuite/tests/typecheck/should_compile/all.T
+++ b/testsuite/tests/typecheck/should_compile/all.T
@@ -444,3 +444,4 @@ test('T10031', normal, compile, [''])
 test('T10072', normal, compile_fail, [''])
 test('T10100', normal, compile, [''])
 test('T10156', normal, compile, [''])
+test('T10177', normal, compile, [''])