[GHC] #7978: Profiling broken

[GHC]

#7978: Profiling broken
--------------------------------------------+------------------------------
        Reporter:  gmainland                |            Owner:
            Type:  bug                      |           Status:  new
        Priority:  highest                  |        Milestone:  7.8.1
       Component:  Compiler                 |          Version:  7.7
      Resolution:                           |         Keywords:
Operating System:  Unknown/Multiple         |     Architecture:
 Type of failure:  GHC doesn't work at all  |  Unknown/Multiple
       Test Case:                           |       Difficulty:  Unknown
        Blocking:                           |       Blocked By:
                                            |  Related Tickets:
--------------------------------------------+------------------------------

Comment (by ezyang):

 I've verified that cardinality + build fixes + mainland workaround result
 in a segfaulting ghc-stage2, e.g. my log looks like:

 {{{
 375cd37 Add a work-around for #7978.
 6265312 Wibbles (merg-os) to ticky-ticky
 507c897 Comments about the Name Cache
 99d4e5b Implement cardinality analysis
 }}}

 I've also verified that profiling is fine before the cardinality analysis
 patch.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7978#comment:12>
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