It fails with:

tc253.hs:23:7: error:
    • Couldn't match type ‘Maybe Int’ with ‘(String, Bool)’
      Expected type: Maybe Int -> (String, Int) -> Maybe Int
        Actual type: Fam Int Bool -> Fam Int Int -> Fam Int Bool
    • In the expression: inc (undefined :: Int)
      In an equation for ‘foo’: foo = inc (undefined :: Int)

Steps to reproduce:

1. Add line

TEST_HC_OPTS += -dinitial-unique=16777000 -dunique-increment=-1

after line

TEST_HC_OPTS = -fforce-recomp -dcore-lint -dcmm-lint -dno-debug-output -no-user-$(GhcPackageDbFlag) -rtsopts $(EXTRA_HC_OPTS)

in mk/test.mk

1. make TESTS=tc253

I suspect this is related to #11148 (closed) since the symptoms are similar.