[Haskell-cafe] GHC threaded RTS will call the finaliser of a ForeignPtr while references still exist

[Don Stewart]

agl:
> I believe that I've managed to distill a crash which has been driving
> me crazy for a few days into a short enough test case (22 lines) that
> it might be useful.
> 
> In short: the threaded RTS will call the finialiser of a ForeignPtr
> while an exception handler still holds a reference to it:
> 
> 
> % ghc -make fptest.hs cbits.c -threaded
> [1 of 1] Compiling Main             ( fptest.hs, fptest.o )
> Linking fptest ...
> % ./fptest
> New object getting created: 66f010
> Finaliser getting called for 66f010
> Use called for 66f010
> 
> 
> cbits.c: http://hpaste.org/6420
> fptest.hs: http://hpaste.org/6421
> 
> I'm hoping that this is useful to someone who knows the RTS.

Create a ticket on the bug tracker, and I'm sure Ian or Simon M will have a look at it.

   http://hackage.haskell.org/trac/ghc/newticket?type=bug 

-- Don