Rename new T9858c to T9858d to avoid test name clash

testsuite/tests/typecheck/should_fail/T9858c.hs → testsuite/tests/typecheck/should_fail/T9858d.hs

 {-# LANGUAGE ImpredicativeTypes, FlexibleContexts #-}
 
-module T9858b where
+module T9858d where
 import Data.Typeable
 
 i :: (Typeable a, Typeable b) => Proxy (a b) -> TypeRep

testsuite/tests/typecheck/should_fail/T9858c.stderr → testsuite/tests/typecheck/should_fail/T9858d.stderr

 
-T9858c.hs:9:8: error:
+T9858d.hs:9:8: error:
     Couldn't match type ‘Eq Int => Int’ with ‘a0 b0’
     Expected type: Proxy (a0 b0)
       Actual type: Proxy (Eq Int => Int)

testsuite/tests/typecheck/should_fail/all.T

@@ -358,4 +358,4 @@ test('T10194', normal, compile_fail, [''])
 test('T8030', normal, compile_fail, [''])
 test('T9858a', normal, compile_fail, [''])
 test('T9858b', normal, compile_fail, [''])
-test('T9858c', normal, compile_fail, [''])
+test('T9858d', normal, compile_fail, [''])