[Haskell-cafe] 'stack test --trace' fails

[Eric]

I just upgraded Stack to v1.0.2 on Mac OS X.  I naively ran 'stack test --trace' hoping to get better messages out of any errorWithStackTrace calls in my tests.  
After a long, successful build, the tests failed with the message 'Could not understand these extra arguments:  +RTS   -xc'. 
Am I doing something obviously wrong?  Or is this a Stack bug?
--Eric
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.haskell.org/pipermail/haskell-cafe/attachments/20160120/0493bfb1/attachment.html>