PackageTests/Regression/T4270/setup.test.hs fails on MacOS on GHC 8.0.2

[robx]

PackageTests/Regression/T4270/setup.test.hs fails on MacOS on GHC 8.0.2, see here: #7952 (comment)

-----BEGIN CABAL OUTPUT-----
Running 1 test suites...
-----END CABAL OUTPUT-----
-----BEGIN CABAL OUTPUT-----
Test suite test: RUNNING...
-----END CABAL OUTPUT-----
setup.dist/work/dist/build/testStub/testStub
panic! read @TestSuiteLog ""
CallStack (from HasCallStack):
  error, called at src/Distribution/Simple/Test/LibV09.hs:133:34 in Cabal-3.7.0.0-inplace:Distribution.Simple.Test.LibV09



*** unexpected failure for PackageTests/Regression/T4270/setup.test.hs

log: https://github.com/haskell/cabal/runs/5178990918?check_suite_focus=true

see also #7989

[Mikolaj]

I wonder if it's an old GHC bug or a new cabal bug. Whichever the case, good it's noted down in case users find anything like that in the wild, perhaps even with newer GHCs.