Crash stemming from MTLRiveColorPixelFormat in New Runtime

[khaptonstall]

Submission checklist

• I have confirmed the issue is present in the latest version of RiveRuntime
• I have searched the documentation and forums and could not find an answer
• I have searched existing issues and this is not a duplicate

Description

We've begun seeing a crash pop up as we're rolling out the New Rive Runtime in our app.

The crash appears on the app.rive.command-server thread with the following stacktrace:

Crashed: app.rive.command-server
0  QuartzCore                     0xb6f24 layer_private_release(_CAMetalLayerPrivate*) + 20
1  QuartzCore                     0xdfdf8 -[CAMetalDrawable dealloc] + 208
2  RiveRuntime                    0x9598c MTLRiveColorPixelFormat + 483780
3  libswiftCore.dylib             0x2f7184 _swift_release_dealloc + 28
4  libswiftCore.dylib             0x2f8060 bool swift::RefCounts<swift::RefCountBitsT<(swift::RefCountInlinedness)1> >::doDecrementSlow<(swift::PerformDeinit)1>(swift::RefCountBitsT<(swift::RefCountInlinedness)1>, unsigned int) + 184
5  libsystem_blocks.dylib         0x16cc _call_dispose_helpers_excp + 44
6  libsystem_blocks.dylib         0x135c _Block_release + 300
7  libsystem_blocks.dylib         0x1074 _Block_object_dispose + 220
8  RiveRuntime                    0x1f680 RiveViewModelInstanceDataTypeFromCpp(rive::DataType) + 47720
9  libsystem_blocks.dylib         0x16cc _call_dispose_helpers_excp + 44
10 libsystem_blocks.dylib         0x135c _Block_release + 300
11 RiveRuntime                    0xe73d4 rive::CommandServer::processCommands() + 18956
12 RiveRuntime                    0xe2968 rive::CommandServer::serveUntilDisconnect() + 48
13 RiveRuntime                    0x137dc RiveHitResultFromRuntime(rive::HitResult) + 18660
14 libdispatch.dylib              0x637a8 _dispatch_call_block_and_release + 24
15 libdispatch.dylib              0x64780 _dispatch_client_callout + 16
16 libdispatch.dylib              0x673c _dispatch_continuation_pop$VARIANT$mp + 444
17 libdispatch.dylib              0x5e60 _dispatch_async_redirect_invoke + 588
18 libdispatch.dylib              0x13ab0 _dispatch_root_queue_drain + 340
19 libdispatch.dylib              0x142ac _dispatch_worker_thread2 + 172
20 libsystem_pthread.dylib        0x1b94 _pthread_wqthread + 224
21 libsystem_pthread.dylib        0x1720 start_wqthread + 8

Additionally, here's the Main Thread stack trace at time of the crash:

com.apple.main-thread
0  libsystem_kernel.dylib         0xfc4 semaphore_timedwait_trap + 8
1  libdispatch.dylib              0x4580 _dispatch_sema4_timedwait$VARIANT$mp + 60
2  libdispatch.dylib              0x4b18 _dispatch_semaphore_wait_slow + 72
3  QuartzCore                     0x230c0 -[CAMetalLayer nextDrawable] + 880
4  MetalKit                       0x1ff8 -[MTKView currentDrawable] + 176
5  RiveRuntime                    0x92a4c MTLRiveColorPixelFormat + 471684
6  RiveRuntime                    0x928d0 MTLRiveColorPixelFormat + 471304
7  RiveRuntime                    0x9371c MTLRiveColorPixelFormat + 474964
8  MetalKit                       0x24fc -[MTKView draw] + 156
9  QuartzCore                     0x1c538 CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 408
10 QuartzCore                     0x2cef4 CA::Context::commit_transaction(CA::Transaction*, double, double*) + 456
11 QuartzCore                     0x5a29c CA::Transaction::commit() + 644
12 QuartzCore                     0x27e54 CA::Display::DisplayLink::dispatch_items(unsigned long long, unsigned long long, unsigned long long) + 1524
13 QuartzCore                     0x3733c display_timer_callback(__CFMachPort*, void*, long, void*) + 368
14 CoreFoundation                 0x74e64 __CFMachPortPerform + 172
15 CoreFoundation                 0x90020 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 56
16 CoreFoundation                 0x91c34 __CFRunLoopDoSource1 + 512
17 CoreFoundation                 0x757c4 __CFRunLoopRun + 2332
18 CoreFoundation                 0x79da0 CFRunLoopRunSpecific + 584
19 GraphicsServices               0x1998 GSEventRunModal + 160
20 UIKitCore                      0x37180c -[UIApplication _run] + 868
21 UIKitCore                      0x371484 UIApplicationMain + 312
22 <Our App>                  0x40f0 main + 14 (main.swift:14)
23 ???                            0x1adb2c344 (Missing)

We've recorded crashes on the following device/OS combinations:

• iPad (7th generation) (iPadOS 16.6.1)

• iPad (6th generation) (iPadOS 16.3.1, 17.0.1)

• iPad (5th generation) (iPadOS 16.7.12, 16.7.16)

• iPhone 8 Plus (iOS 16.7.16)

• iPhone 8 (iOS 16.7.16)

• iPhone 15 Plus (iOS 17.3.1)

Personally, I have been unable to reproduce on the following:

• iPad Pro (10.5 in) (iPadOS 17.4.1)
• iPad (7th generation) (iPadOS 18.7.9)
• iPad Simulator (7th generation) (iPadOS 16.4)

Previous working version

No response

Rive Apple runtime version

6.20.5

Reproduction steps / code

No response

Upload your reproduction files / stack trace

No response

Source .riv / .rev file

No response

Screenshots / video

No response

Device

iPad/iPhone

Apple OS version

• iPadOS 16.x.x, 17.x.x
• iOS 16.x.x, 17.x.x

Additional context

No response