recomp001 failing on OSX for Phab:D2853

Ben Gamari ben at
Tue Jan 17 18:12:52 UTC 2017

Luke Maurer <maurerl at> writes:

> Getting an odd test failure from Phab:
> @@ -1,2 +0,0 @@
> -
> -C.hs:3:11: Module ‘B’ does not export ‘foo’
> Actual stderr output differs from expected:
> *** unexpected failure for recomp001(normal)
> I can't explain how my changes would break module exports *at all,* much 
> less only on OSX. Found a Mac (running Mavericks and GHC 8.0.1) but 
> couldn't reproduce it there. Thoughts? I'd love to nail this as soon as 
> possible so I can get join points in before the feature freeze ...
Fear not! This is indeed a known issue (with a patch even, see


- Ben
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