[MacRuby-devel] TwUI & MacRuby issue

isaac kearse isaackearse at gmail.com
Fri Dec 23 15:19:21 PST 2011

Hi Watson,

Thanks for taking a look!

This is where it crashes in TwUI:


On Sat, Dec 24, 2011 at 11:59 AM, Watson <watson1978 at gmail.com> wrote:
> Hi,
> Now I have seen your project.
> Apparently, it is crashed by lib/views/ExampleTabBar.rb(line:10)
> To determine the cause, I need more time.
> Thanks,
> 2011/12/24 isaac kearse <isaackearse at gmail.com>:
>> I should have also mentioned that I can reproduce this crash on
>> MacRuby 0.10, 0.11 and the latest nightly build.
>> On Sat, Dec 24, 2011 at 11:19 AM, isaac kearse <isaackearse at gmail.com> wrote:
>>> TwUI is a hardware accelerated UI framework for Mac, inspired by
>>> UIKit: https://github.com/twitter/twui
>>> I'd like to try using it in my MacRuby apps, so I thought to start
>>> with I would port the the TwUI Example Project to MacRuby.
>>> TwUI Example Project: https://github.com/twitter/twui/tree/master/ExampleProject
>>> MacRuby: https://github.com/isaac/TwUIExample
>>> I got a basic version of the example app working, but as I was
>>> implementing the tab bar the app crashed with this exception:
>>> Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
>>> Exception Codes: KERN_INVALID_ADDRESS at 0x000000000000000a
>>> Here is the full crash report: https://gist.github.com/78e7f9870b788e8fd4c9
>>> I have tried to make this crash easy to replicate by writing a Rake
>>> task and instructions for installing the TwUI framework for MacRuby -
>>> details here: https://github.com/isaac/TwUIExample/blob/master/README.md
>>> The app was originally written with HotCocoa, but there is also an
>>> Xcode version that reproduces the same crash here:
>>> https://github.com/isaac/TwUIExample/tree/master/Xcode
>>> I thought this might be related to the fact that TwUI doesn't use
>>> garbage collection, but I can also reproduce this crash with a fork
>>> that uses ARC here:
>>> https://github.com/jspahrsummers/twui/tree/SnowLeopardCompatibility
>>> Let me know if I should open a Trac ticket about this, I'm not sure if
>>> it is a MacRuby issue or not.
>>> Any help would be greatly appreciated!
>>> Cheers,
>>> Isaac
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