[GHC] #14972: MacOS panic on TH

[GHC]

#14972: MacOS panic on TH
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        Reporter:  harpocrates       |                Owner:  (none)
            Type:  bug               |               Status:  patch
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.4.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Compile-time      |  Unknown/Multiple
  crash or panic                     |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  D4553
       Wiki Page:                    |
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Changes (by angerman):

 * status:  new => patch
 * differential:   => D4553


Comment:

 Differential that ensures we verify whatever `gcc --print-file-name`
 returns is actually a file, and ignore it if not. (Should ignore folders).

 @ezyang, thanks for the analysis!

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14972#comment:10>
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