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Chipmunk Physics • View topic - SIGSYS crash

SIGSYS crash

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SIGSYS crash

Postby rmyers » Fri Sep 07, 2012 12:20 pm

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Re: SIGSYS crash

Postby slembcke » Fri Sep 07, 2012 1:01 pm

Hmm. That's a super weird signal to crash on in that function. It's when you call a system function with a bad argument. I couldn't reproduce the error. Can you give me any more information? Which Chipmunk/Xcode/SDK versions? Can you make a project that replicates the issue as simply as possible that you can send me?

So leafSetTrans() may have some other function calls into it which may call calloc(). There is also an assertion to check if the allocation worked correctly that may call cpMessage() which can call printf() and friends. So something with a failed allocation is the best I can think of for what is causing the SIGSYS.
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Re: SIGSYS crash

Postby rmyers » Fri Sep 07, 2012 4:30 pm

I'm using Xcode 4.0.2, sdk 4.3. I'm not sure how to find out the chipmunk version; I'm not the one who set up the project originally, but I assume he downloaded the latest one when he started on it in June.

I made a new test project that behaves the same way, but the .zip file of it is too big to attach here. I just started with an empty project, copied the Chipmunk-iPhone directory into it, then copied the code below into RootViewController's viewDidLoad. It works fine in the simulator, but when I try to run it on a 4.3.5 iTouch, I get the crash as above.

Thanks a lot for looking into this.
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Re: SIGSYS crash

Postby rmyers » Tue Sep 11, 2012 11:56 am

Update: I tried it with an older device, a 3rd gen iTouch running 4.2.1, and it did work, so that led me to believe it was finally time to update my XCode version. I tried that on a newer machine and it worked fine with the one that was crashing before.
It still would be nice to know if there's something I can do on the older machine to make it work, but I guess this is a good enough solution for now.
Thanks again.
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Re: SIGSYS crash

Postby slembcke » Tue Sep 11, 2012 12:41 pm

Hmm. Well that's good to know then.

I really have no idea what would be causing the issue though unfortunately...
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