I've found the problem (actually, the compiler warned about it). It turns out there is a bug report related to this (http://hackage.haskell.org/trac/gtk2hs/ticket/1256), but that the provided patch isn't enough to fix the problem. I'll alert the gtk2hs team about this. cheers /Johan

The same problem with ghc74 (I did not use [testing] -- only [ghc74], [extra] and [community]). You can try this with the haskell-gtk demos, e.g. the hello demo. Make it, run it and push the button and bang -- Segfault. /Johan 2012/3/4 Magnus Therning :

On Sun, Mar 04, 2012 at 01:14:11PM +0100, Johan Holmquist wrote:

...

Great news!

I jumped in to try, but I'm having trouble with haskell-gtk. Every piece of code using event handlers segfaults.

I have removed every haskell package and installed ghc and haskell-gtk from [extra], then also built haskell-gtk from abs, but with same (crashing result).

I don't know if I should report the error upstream, would be great if someone could verify. (For example demo/hello/World.hs which segfaults on my machine).

Have you verified it against my [ghc74] repo?  It's quickly done and would at least give you one other data point.

/M

-- Magnus Therning                      OpenPGP: 0xAB4DFBA4 email: magnus@therning.org   jabber: magnus@therning.org twitter: magthe               http://therning.org/magnus

Most software today is very much like an Egyptian pyramid with millions of bricks piled on top of each other, with no structural integrity, but just done by brute force and thousands of slaves.     -- Alan Kay

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On Mon, Mar 5, 2012 at 12:51, Johan Holmquist wrote:

Checked the code at http://code.haskell.org/gtk2hs/glib/System/Glib/hsgclosure.c and it is obviously fixed. I don't know why it didn't work from the community or ghc74 repositories (maybe I did a mistake somewhere).

Since it looks like you're looking at the upstream source repo it could be that they haven't released a fixed version yet. In putting together [ghc74] I had to make some minor changes to some of the gtk2-related packages in order to make them compile. At the time those changes were already in upstream, but no version with those changes had been released yet.

I will try to fetch the source for haskell-glib with abs from [ghc74] when I get home to see if it has the correct (?) code or the faulty one. Still it is (was yesterday) faulty in [community]. I'll check that again and provide a bug report if necessary.

Both [community] and [ghc74] are built from the versions available on Hackage. I believe both are unpatched, so you can just check the version on Hackage. /M -- Magnus Therning                      OpenPGP: 0xAB4DFBA4 email: magnus@therning.org   jabber: magnus@therning.org twitter: magthe               http://therning.org/magnus

On Mon, Mar 5, 2012 at 13:44, Johan Holmquist wrote:

2012/3/5 Magnus Therning :

...

Both [community] and [ghc74] are built from the versions available on Hackage.  I believe both are unpatched, so you can just check the version on Hackage.

You're right, glib-0.12.2 on Hackage is not patched. Waiting for that to happen then.

In addition to waiting you can always raise a bug and/or send an email to the author/maintainer of the packages to encourage them to release a new version ASAP... or at least to find out what the hold-up is ;) /M -- Magnus Therning                      OpenPGP: 0xAB4DFBA4 email: magnus@therning.org   jabber: magnus@therning.org twitter: magthe               http://therning.org/magnus