Add regression test for #10504
This issue was fixed at some point between GHC 8.0 and 8.2. Let's add a regression test to ensure that it stays fixed.
Fixes #10504 (closed).
This issue was fixed at some point between GHC 8.0 and 8.2. Let's add a regression test to ensure that it stays fixed.
Fixes #10504 (closed).