[GHC] #8276: Building Haddock documentation panics with perf build on x86_64 Linux

[GHC]

#8276: Building Haddock documentation panics with perf build on x86_64 Linux
---------------------------------------+----------------------------------
        Reporter:  jstolarek           |            Owner:
            Type:  bug                 |           Status:  new
        Priority:  high                |        Milestone:
       Component:  Documentation       |          Version:  7.7
      Resolution:                      |         Keywords:
Operating System:  Unknown/Multiple    |     Architecture:  x86_64 (amd64)
 Type of failure:  Compile-time crash  |       Difficulty:  Unknown
       Test Case:                      |       Blocked By:
        Blocking:                      |  Related Tickets:
---------------------------------------+----------------------------------

Comment (by kazu-yamamoto):

 Does anyone know the reason why the initial value of v_opt_C_ready in GHCi
 change?

 For GHCi 7.6.3:

 {{{
 % ghci -package ghc
 > import StaticFlags (v_opt_C_ready)
 > import Data.IORef
 > readIORef v_opt_C_ready
 False
 }}}

 For GHCi head:

 {{{
 % ghci -package ghc
 > import StaticFlags (v_opt_C_ready)
 > import Data.IORef
 > readIORef v_opt_C_ready
 True
 }}}

 I don't understand why this value can stay False in GHCi 7.6.3.

 And I don't know which commit changed the behavior.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8276#comment:17>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler