[GHC] #8236: Assertion failure of MarkWeak

[GHC]

#8236: Assertion failure of MarkWeak
-------------------------------------+------------------------------------
        Reporter:  kazu-yamamoto     |            Owner:
            Type:  bug               |           Status:  new
        Priority:  high              |        Milestone:  7.8.1
       Component:  Runtime System    |          Version:  7.7
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  Runtime crash     |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
-------------------------------------+------------------------------------

Comment (by akio):

 I attached a file that I think reproduces this problem.

 If I compile it like

 {{{
 ghc-stage1 weak-assertion.hs -threaded -O2
 }}}

 and run it, it doesn't terminate (but it should). If I add
 {{{-threaded}}}, it shows the same assertion failure as the original
 problem:

 {{{
     (GHC version 7.7.20130906 for x86_64_unknown_linux)
     Please report this as a GHC bug:
 http://www.haskell.org/ghc/reportabug
 }}}

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8236#comment:2>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler