Re: macOS Metal Issue - App Crashes Immediately

VZ> Does this happen only with the universal builds or with just arm64 one
too?

I'm on an x86_64 Mac, but it happens with the universal builds as well as 
the x86_64 build

I tried your advice (reducing my application code until the issue 
disappears) by commenting out a large chunk of the GUI setup code, and my 
app ran without crashing. However, clicking on any button or menu item 
causes the same Metal-related crash.

I did more experiments with the environment—I tried downgrading to the 
MacOS 13.1 SDK, but that didn't fix it. I tried downloading Xcode 14, but 
Xcode 14 won't run on macOS 14. So I made a bootable USB with macOS 13 and 
Xcode 14, and the app runs perfectly using the exact same Xcode project.

I then exported the build commands from both Xcode 15 and Xcode 14 and did 
a git diff on them. There are numerous differences. I can post both files 
somewhere if anyone wants to see them.

Anyways, I'm currently circumventing the problem by using a bash script 
made up of all the Xcode 14 build commands.

Conclusion: I think the problem is the interaction between wxWidgets and 
Xcode 15.

On Friday, March 15, 2024 at 12:00:38 PM UTC-7 Vadim Zeitlin wrote:

> On Fri, 15 Mar 2024 09:43:38 -0700 (PDT) Henry M wrote:
>
> HM> I have no issues building and running my wxWidgets project with Xcode 
> 14 on 
> HM> macOS 12.7. However, when building it and running it with Xcode 15 on 
> macOS 
> HM> 14.4, the app crashes once it gets to this line: 
> wxIMPLEMENT_APP(myApp);
>
> Sorry, I don't have Xcode 15 yet, so I can't test this and all I can say
> is that "this line" is the application entry point, so it doesn't really
> say much. Also, the crash doesn't happen in the main thread.
>
> HM> I first thought the crash was due to an outdated wxWidgets build, so I 
> HM> rebuilt it with the following commands, but that didn't fix it.
> HM> 
> HM> git clone --recurse-submodules 
> HM> https://github.com/wxWidgets/wxWidgets.git ./configure 
> --disable-sys-libs 
> HM> --enable-macosx_arch=x86_64,arm64 make -j5
>
> Does this happen only with the universal builds or with just arm64 one
> too?
>
> HM> The stack trace shows that the crash comes from an instruction in 
> HM> MTLInputStageReflectionReader::deserialize(id<MTLDeviceSPI>, 
> HM> NSObject<OS_dispatch_data>*, NSObject<OS_dispatch_data>) (), which is 
> is a 
> HM> Metal library.
> HM> 
> HM> Does anyone have any ideas where I should start looking to fix this 
> issue?
>
> As wx doesn't Metal at all, it's really difficult to say, unfortunately.
>
> HM> Also, I should mention that on the newer Mac, I'm able to build (from 
> the 
> HM> command line) all the wxWidgets OpenGL samples and the wxWidgets 
> minimal 
> HM> sample and run them without issue.
>
> The usual advice is to start bisecting the problem, i.e. reduce your
> application code, by disabling parts of it, until the issue disappears.
>
> Good luck,
> VZ
>
> -- 
> TT-Solutions: wxWidgets consultancy and technical support
> https://www.tt-solutions.com/
>

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