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-rw-r--r--testsuite/tests/impredicative/T18126-nasty.hs2
1 files changed, 2 insertions, 0 deletions
diff --git a/testsuite/tests/impredicative/T18126-nasty.hs b/testsuite/tests/impredicative/T18126-nasty.hs
index 2e747d0791..da6e872e47 100644
--- a/testsuite/tests/impredicative/T18126-nasty.hs
+++ b/testsuite/tests/impredicative/T18126-nasty.hs
@@ -9,6 +9,8 @@ module Bug where
-- (which here is switched on by ($))
-- beecause of a very subtle issue where we instantiate an
-- instantiation variable with (F alpha), where F is a type function
+--
+-- It's a stripped-dwn version of T5490
register :: forall rs op_ty.
(HDrop rs ~ HSingle (WaitOpResult op_ty))