[GHC] #11304: GHC master segfaults when run with +RTS -h

[GHC]

#11304: GHC master segfaults when run with +RTS -h
-------------------------------------+-------------------------------------
           Reporter:  bgamari        |             Owner:  simonmar
               Type:  bug            |            Status:  new
           Priority:  highest        |         Milestone:  8.0.1
          Component:  Compiler       |           Version:  7.11
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  Runtime crash
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
-------------------------------------+-------------------------------------
 {{{
 $ ghc --version
 The Glorious Glasgow Haskell Compilation System, version 7.11.20151218
 $ ghc +RTS -h
 ghc: no input files
 Usage: For basic information, try the `--help' option.
 Segmentation fault
 }}}

 This appears to be due to ce1f1607ed7f8fedd2f63c8610cafefd59baaf32,

 {{{
 commit ce1f1607ed7f8fedd2f63c8610cafefd59baaf32
 Author: Simon Marlow <marlowsd at gmail.com>
 Date:   Sat Nov 7 09:39:05 2015 +0000

     Make GHCi & TH work when the compiler is built with -prof
 }}}

 Which removes an `initProfiling2` call from `hs_init_ghc`, which means
 that `initHeapProfiling` is never called, which means that `censuses` is
 never initialized, which causes a crash during cleanup on RTS shutdown.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11304>
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