[GHC] #7317: Segmentation fault in RTS' STM code on git master

[GHC]

#7317: Segmentation fault in RTS' STM code on git master
-------------------------------+--------------------------------------------
  Reporter:  bgamari           |          Owner:                  
      Type:  bug               |         Status:  closed          
  Priority:  normal            |      Milestone:  7.8.1           
 Component:  Runtime System    |        Version:  7.7             
Resolution:  fixed             |       Keywords:  rts, stm, segv  
        Os:  Unknown/Multiple  |   Architecture:  Unknown/Multiple
   Failure:  None/Unknown      |     Difficulty:  Unknown         
  Testcase:                    |      Blockedby:                  
  Blocking:                    |        Related:                  
-------------------------------+--------------------------------------------
Changes (by simonmar):

  * status:  new => closed
  * difficulty:  => Unknown
  * resolution:  => fixed
  * milestone:  => 7.8.1


Comment:

 I believe I just fixed this, in

 {{{
 commit 412af8c2eb2f2c689f77fa9e061d45eaa37110f1
 Author: Simon Marlow <marlowsd at gmail.com>
 Date:   Mon Oct 22 11:43:18 2012 +0100

     Foreign calls can clobber heap & stack memory too

     We were making an aggressive assumption that foreign calls cannot
     clobber heap or stack memory, which for the majority of foreign calls
     is true, but we violate the assumption in the implementation of
     primops in the RTS.  This was causing crashes in some STM tests.
 }}}

 Please re-open the ticket if you still encounter problems.

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7317#comment:3>
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