[GHC] #13527: ghc has a stack space leak when prints warnings

[GHC]

#13527: ghc has a stack space leak when prints warnings
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        Reporter:  slyfox            |                Owner:  (none)
            Type:  bug               |               Status:  merge
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by bgamari):

 comment:7 addresses comment:6. With this patch and
 065be6e9eb5114c5f0e3a20626ec93042ce47f13 the test in comment:1 runs to
 completion without a stack overflow.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13527#comment:10>
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