# Anyone seeing issues with USD on M1 Macs?

**URL:** https://forum.aousd.org/t/anyone-seeing-issues-with-usd-on-m1-macs/599
**Category:** USD
**Created:** [September 5, 2023, 6:32pm UTC](https://forum.aousd.org/t/anyone-seeing-issues-with-usd-on-m1-macs/599 "2023-09-05T18:32:32Z")
**Posts on this page:** 5
**Page:** 1

<div class="post-metadata">

### Author: ![mtucker](https://avatars.discourse-cdn.com/v4/letter/m/54ee81/32.png) [@mtucker](https://forum.aousd.org/u/mtucker)
#### Post date: [September 5, 2023, 6:32pm UTC](https://forum.aousd.org/t/anyone-seeing-issues-with-usd-on-m1-macs/599/1 "2023-09-05T18:32:32Z")

</div>

Hi everyone, we’re seeing an intermittent crash on M1 Mac builds of USD, and I’m just wondering if anyone else is seeing anything similar. Basically we have a bit of python code that gets a USD file path and runs:

```auto
        s = Usd.Stage.CreateInMemory()
        prim = s.DefinePrim('/asset')
        prim.GetReferences().AddReference(asset_file_path)

```

During the AddReference call, there is (rarely, but sometimes) a crash. Attached at the bottom of the message is the stack trace of the crashing (worker) thread and the main thread at the time of the crash, starting at the AddReference call.

This is USD 23.08 (with a few modifications - [GitHub - sideeffects/USD at dev\_houdini20.0beta](https://github.com/sideeffects/USD/tree/dev_houdini20.0beta) to be precise). Built as an arm64 binary on OSX 13 with clang14.0 (at least that’s what the build machine is telling me).

Are we alone in this, or has anyone else seen similar issues?

Thanks,  
Mark

```auto

-- TRACEBACK BEGIN --

2 libHoudiniUT.dylib 0x00000001098ec56c stackTrace(UTsignalHandlerArg) + 272

3 libHoudiniUT.dylib 0x00000001098ec100 signalCallback(UTsignalHandlerArg) + 320

4 libHoudiniUT.dylib 0x0000000109c797c4 UT_Signal::processSignal(int, __siginfo*, void*) + 112

5 libsystem_platform.dylib 0x00000001a2f5ea84 _sigtramp + 56

6 libpxr_pcp.dylib 0x000000010e1e3dd8 pxrInternal_v0_23 __pxrReserved__ ::PcpPrimIndex_Graph::New(pxrInternal_v0_23 __pxrReserved__ ::TfRefPtr<pxrInternal_v0_23 __pxrReserved__ ::PcpPrimIndex_Graph> const&) + 176

7 libpxr_pcp.dylib 0x000000010e25e880 pxrInternal_v0_23 __pxrReserved__ ::Pcp_BuildPrimIndex(pxrInternal_v0_23 __pxrReserved__ ::PcpLayerStackSite const&, pxrInternal_v0_23 __pxrReserved__ ::PcpLayerStackSite const&, int, bool, bool, bool, pxrInternal_v0_23 __pxrReserved__ ::PcpPrimIndex_StackFrame*, pxrInternal_v0_23 __pxrReserved__ ::PcpPrimIndexInputs const&, pxrInternal_v0_23 __pxrReserved__ ::PcpPrimIndexOutputs*) + 1280

8 libpxr_pcp.dylib 0x000000010e25d754 pxrInternal_v0_23 __pxrReserved__ ::PcpComputePrimIndex(pxrInternal_v0_23 __pxrReserved__ ::SdfPath const&, pxrInternal_v0_23 __pxrReserved__ ::TfWeakPtr<pxrInternal_v0_23 __pxrReserved__ ::PcpLayerStack> const&, pxrInternal_v0_23 __pxrReserved__ ::PcpPrimIndexInputs const&, pxrInternal_v0_23 __pxrReserved__ ::PcpPrimIndexOutputs*, pxrInternal_v0_23 __pxrReserved__ ::ArResolver*) + 572

9 libpxr_pcp.dylib 0x000000010e1fc788 pxrInternal_v0_23 __pxrReserved__ ::PcpCache::_ParallelIndexer::_ComputeIndex(pxrInternal_v0_23 __pxrReserved__ ::PcpPrimIndex const*, pxrInternal_v0_23 __pxrReserved__ ::SdfPath, bool) + 480

10 libpxr_pcp.dylib 0x000000010e1fefa4 pxrInternal_v0_23 __pxrReserved__ ::PcpCache::_ParallelIndexer::_ComputeIndex(pxrInternal_v0_23 __pxrReserved__ ::PcpPrimIndex const*, pxrInternal_v0_23 __pxrReserved__ ::SdfPath, bool)::'lambda'()::operator()() const + 60

11 libpxr_pcp.dylib 0x000000010e1feeec pxrInternal_v0_23 __pxrReserved__ ::WorkDispatcher::_InvokerTask<pxrInternal_v0_23 __pxrReserved__ ::PcpCache::_ParallelIndexer::_ComputeIndex(pxrInternal_v0_23 __pxrReserved__ ::PcpPrimIndex const*, pxrInternal_v0_23 __pxrReserved__ ::SdfPath, bool)::'lambda'()>::execute() + 36

12 libtbb.dylib 0x00000001025f46b0 tbb::internal::custom_scheduler<tbb::internal::IntelSchedulerTraits>::process_bypass_loop(tbb::internal::context_guard_helper<false>&, tbb::task*, long) + 440

13 libtbb.dylib 0x00000001025f3d4c tbb::internal::custom_scheduler<tbb::internal::IntelSchedulerTraits>::local_wait_for_all(tbb::task&, tbb::task*) + 188

14 libtbb.dylib 0x00000001025eccf8 tbb::internal::arena::process(tbb::internal::generic_scheduler&) + 252

15 libtbb.dylib 0x00000001025ec3d4 tbb::internal::market::process(rml::job&) + 40

16 libtbb.dylib 0x00000001025e6564 tbb::internal::rml::private_worker::run() + 284

17 libtbb.dylib 0x00000001025e643c tbb::internal::rml::private_worker::thread_routine(void*) + 12

18 libsystem_pthread.dylib 0x00000001a2f2ffa8 _pthread_start + 148

19 libsystem_pthread.dylib 0x00000001a2f2ada0 thread_start + 8

-- TRACEBACK END --

72011: Fatal error: Segmentation fault (sent by pid 0)

-- TRACEBACK BEGIN --

2 libHoudiniUT.dylib 0x00000001098ec56c stackTrace(UTsignalHandlerArg) + 272

3 libHoudiniUT.dylib 0x00000001098ec1dc signalCallback(UTsignalHandlerArg) + 540

4 libHoudiniUT.dylib 0x0000000109c797c4 UT_Signal::processSignal(int, __siginfo*, void*) + 112

5 libsystem_platform.dylib 0x00000001a2f5ea84 _sigtramp + 56

6 libpxr_pcp.dylib 0x000000010e1fbffc pxrInternal_v0_23 __pxrReserved__ ::PcpPrimIndex::operator=(pxrInternal_v0_23 __pxrReserved__ ::PcpPrimIndex&&) + 84

7 libpxr_pcp.dylib 0x000000010e1fdd7c pxrInternal_v0_23 __pxrReserved__ ::PcpCache::_ParallelIndexer::_PublishOneOutput(std:: __1::pair<pxrInternal_v0_23__ pxrReserved __::SdfPathTable<pxrInternal_v0_23__ pxrReserved __::PcpPrimIndex>::NodeHandle, pxrInternal_v0_23__ pxrReserved__::PcpPrimIndexOutputs>&&, bool) + 160

8 libpxr_pcp.dylib 0x000000010e1fd700 pxrInternal_v0_23 __pxrReserved__ ::PcpCache::_ParallelIndexer::_PublishOutputs() + 132

9 libpxr_pcp.dylib 0x000000010e1fcc00 pxrInternal_v0_23 __pxrReserved__ ::PcpCache::_ParallelIndexer::_ComputeIndex(pxrInternal_v0_23 __pxrReserved__ ::PcpPrimIndex const*, pxrInternal_v0_23 __pxrReserved__ ::SdfPath, bool) + 1624

10 libpxr_pcp.dylib 0x000000010e1fefa4 pxrInternal_v0_23 __pxrReserved__ ::PcpCache::_ParallelIndexer::_ComputeIndex(pxrInternal_v0_23 __pxrReserved__ ::PcpPrimIndex const*, pxrInternal_v0_23 __pxrReserved__ ::SdfPath, bool)::'lambda'()::operator()() const + 60

11 libpxr_pcp.dylib 0x000000010e1feeec pxrInternal_v0_23 __pxrReserved__ ::WorkDispatcher::_InvokerTask<pxrInternal_v0_23 __pxrReserved__ ::PcpCache::_ParallelIndexer::_ComputeIndex(pxrInternal_v0_23 __pxrReserved__ ::PcpPrimIndex const*, pxrInternal_v0_23 __pxrReserved__ ::SdfPath, bool)::'lambda'()>::execute() + 36

12 libtbb.dylib 0x00000001025f46b0 tbb::internal::custom_scheduler<tbb::internal::IntelSchedulerTraits>::process_bypass_loop(tbb::internal::context_guard_helper<false>&, tbb::task*, long) + 440

13 libtbb.dylib 0x00000001025f3d4c tbb::internal::custom_scheduler<tbb::internal::IntelSchedulerTraits>::local_wait_for_all(tbb::task&, tbb::task*) + 188

14 libpxr_work.dylib 0x00000001025b2678 pxrInternal_v0_23 __pxrReserved__ ::WorkDispatcher::Wait() + 60

15 libpxr_pcp.dylib 0x000000010e1fc518 pxrInternal_v0_23 __pxrReserved__ ::PcpCache::_ParallelIndexer::RunAndWait()::'lambda'()::operator()() const + 240

16 libtbb.dylib 0x00000001025ef038 tbb::interface7::internal::isolate_within_arena(tbb::interface7::internal::delegate_base&, long) + 92

17 libpxr_pcp.dylib 0x000000010e1fa194 pxrInternal_v0_23 __pxrReserved__ ::PcpCache::_ParallelIndexer::RunAndWait() + 72

18 libpxr_pcp.dylib 0x000000010e1f9540 pxrInternal_v0_23 __pxrReserved__ ::PcpCache::_ComputePrimIndexesInParallel(std:: __1::vector<pxrInternal_v0_23__ pxrReserved __::SdfPath, std::__ 1::allocator<pxrInternal_v0_23 __pxrReserved__ ::SdfPath>> const&, std:: __1::vector<std::__ 1::shared_ptr<pxrInternal_v0_23 __pxrReserved__ ::PcpErrorBase>, std:: __1::allocator<std::__ 1::shared_ptr<pxrInternal_v0_23 __pxrReserved__ ::PcpErrorBase>>>*, pxrInternal_v0_23 __pxrReserved__ ::PcpCache::_UntypedIndexingChildrenPredicate, pxrInternal_v0_23 __pxrReserved__ ::PcpCache::_UntypedIndexingPayloadPredicate, char const*, char const*) + 1384

19 libpxr_usd.dylib 0x000000011b3d8424 pxrInternal_v0_23 __pxrReserved__ ::UsdStage::_ComposePrimIndexesInParallel(std:: __1::vector<pxrInternal_v0_23__ pxrReserved __::SdfPath, std::__ 1::allocator<pxrInternal_v0_23 __pxrReserved__ ::SdfPath>> const&, std:: __1::basic_string<char, std::__ 1::char_traits<char>, std:: __1::allocator<char>> const&, pxrInternal_v0_23__ pxrReserved__::Usd_InstanceChanges*) + 692

20 libpxr_usd.dylib 0x000000011b42d3c8 void pxrInternal_v0_23 __pxrReserved__ ::UsdStage::_RecomposePrims<std:: __1::map<pxrInternal_v0_23__ pxrReserved __::SdfPath, std::__ 1::vector<pxrInternal_v0_23 __pxrReserved__ ::SdfChangeList::Entry const*, std:: __1::allocator<pxrInternal_v0_23__ pxrReserved __::SdfChangeList::Entry const*>>, std::__ 1::less<pxrInternal_v0_23 __pxrReserved__ ::SdfPath>, std:: __1::allocator<std::__ 1::pair<pxrInternal_v0_23 __pxrReserved__ ::SdfPath const, std:: __1::vector<pxrInternal_v0_23__ pxrReserved __::SdfChangeList::Entry const*, std::__ 1::allocator<pxrInternal_v0_23 __pxrReserved__ ::SdfChangeList::Entry const*>>>>>>(std:: __1::map<pxrInternal_v0_23__ pxrReserved __::SdfPath, std::__ 1::vector<pxrInternal_v0_23 __pxrReserved__ ::SdfChangeList::Entry const*, std:: __1::allocator<pxrInternal_v0_23__ pxrReserved __::SdfChangeList::Entry const*>>, std::__ 1::less<pxrInternal_v0_23 __pxrReserved__ ::SdfPath>, std:: __1::allocator<std::__ 1::pair<pxrInternal_v0_23 __pxrReserved__ ::SdfPath const, std:: __1::vector<pxrInternal_v0_23__ pxrReserved __::SdfChangeList::Entry const*, std::__ 1::allocator<pxrInternal_v0_23 __pxrReserved__ ::SdfChangeList::Entry const*>>>>>*) + 584

21 libpxr_usd.dylib 0x000000011b3f6db0 void pxrInternal_v0_23 __pxrReserved__ ::UsdStage::_Recompose<std:: __1::map<pxrInternal_v0_23__ pxrReserved __::SdfPath, std::__ 1::vector<pxrInternal_v0_23 __pxrReserved__ ::SdfChangeList::Entry const*, std:: __1::allocator<pxrInternal_v0_23__ pxrReserved __::SdfChangeList::Entry const*>>, std::__ 1::less<pxrInternal_v0_23 __pxrReserved__ ::SdfPath>, std:: __1::allocator<std::__ 1::pair<pxrInternal_v0_23 __pxrReserved__ ::SdfPath const, std:: __1::vector<pxrInternal_v0_23__ pxrReserved __::SdfChangeList::Entry const*, std::__ 1::allocator<pxrInternal_v0_23 __pxrReserved__ ::SdfChangeList::Entry const*>>>>>>(pxrInternal_v0_23 __pxrReserved__ ::PcpChanges const&, std:: __1::map<pxrInternal_v0_23__ pxrReserved __::SdfPath, std::__ 1::vector<pxrInternal_v0_23 __pxrReserved__ ::SdfChangeList::Entry const*, std:: __1::allocator<pxrInternal_v0_23__ pxrReserved __::SdfChangeList::Entry const*>>, std::__ 1::less<pxrInternal_v0_23 __pxrReserved__ ::SdfPath>, std:: __1::allocator<std::__ 1::pair<pxrInternal_v0_23 __pxrReserved__ ::SdfPath const, std:: __1::vector<pxrInternal_v0_23__ pxrReserved __::SdfChangeList::Entry const*, std::__ 1::allocator<pxrInternal_v0_23 __pxrReserved__ ::SdfChangeList::Entry const*>>>>>*) + 1000

22 libpxr_usd.dylib 0x000000011b3f1ab0 pxrInternal_v0_23 __pxrReserved__ ::UsdStage::_ProcessPendingChanges() + 172

23 libpxr_usd.dylib 0x000000011b3f8298 pxrInternal_v0_23 __pxrReserved__ ::UsdStage::_HandleLayersDidChange(pxrInternal_v0_23 __pxrReserved__ ::SdfNotice::LayersDidChangeSentPerLayer const&) + 3544

24 libpxr_usd.dylib 0x000000011b42f904 pxrInternal_v0_23 __pxrReserved__ ::TfNotice::_StandardDeliverer<pxrInternal_v0_23 __pxrReserved__ ::TfNotice::_Deliverer<pxrInternal_v0_23 __pxrReserved__ ::TfWeakPtr<pxrInternal_v0_23 __pxrReserved__ ::UsdStage>, pxrInternal_v0_23 __pxrReserved__ ::TfWeakPtr<pxrInternal_v0_23 __pxrReserved__ ::SdfLayer>, void (pxrInternal_v0_23 __pxrReserved__ ::UsdStage::*)(pxrInternal_v0_23 __pxrReserved__ ::SdfNotice::LayersDidChangeSentPerLayer const&), pxrInternal_v0_23 __pxrReserved__ ::SdfNotice::LayersDidChangeSentPerLayer>>::_SendToListener(pxrInternal_v0_23 __pxrReserved__ ::TfNotice const&, pxrInternal_v0_23 __pxrReserved__ ::TfType const&, pxrInternal_v0_23 __pxrReserved__ ::TfWeakBase const*, void const*, std::type_info const&, std:: __1::vector<pxrInternal_v0_23__ pxrReserved __::TfWeakPtr<pxrInternal_v0_23__ pxrReserved __::TfNotice::Probe>, std::__ 1::allocator<pxrInternal_v0_23 __pxrReserved__ ::TfWeakPtr<pxrInternal_v0_23 __pxrReserved__ ::TfNotice::Probe>>> const&) + 120

25 libpxr_tf.dylib 0x000000010e36b648 pxrInternal_v0_23 __pxrReserved__ ::Tf_NoticeRegistry::_Deliver(pxrInternal_v0_23 __pxrReserved__ ::TfNotice const&, pxrInternal_v0_23 __pxrReserved__ ::TfType const&, pxrInternal_v0_23 __pxrReserved__ ::TfWeakBase const*, void const*, std::type_info const&, std:: __1::vector<pxrInternal_v0_23__ pxrReserved __::TfWeakPtr<pxrInternal_v0_23__ pxrReserved __::TfNotice::Probe>, std::__ 1::allocator<pxrInternal_v0_23 __pxrReserved__ ::TfWeakPtr<pxrInternal_v0_23 __pxrReserved__ ::TfNotice::Probe>>> const&, std:: __1::pair<std::__ 1::list<pxrInternal_v0_23 __pxrReserved__ ::TfNotice::_DelivererBase*, std:: __1::allocator<pxrInternal_v0_23__ pxrReserved __::TfNotice::_DelivererBase*>>*, std::__ 1:: __list_iterator<pxrInternal_v0_23__ pxrReserved__::TfNotice::_DelivererBase*, void*>> const&) + 192

26 libpxr_tf.dylib 0x000000010e36aef4 pxrInternal_v0_23 __pxrReserved__ ::Tf_NoticeRegistry::_Send(pxrInternal_v0_23 __pxrReserved__ ::TfNotice const&, pxrInternal_v0_23 __pxrReserved__ ::TfType const&, pxrInternal_v0_23 __pxrReserved__ ::TfWeakBase const*, void const*, std::type_info const&) + 1228

27 libpxr_tf.dylib 0x000000010e397e44 pxrInternal_v0_23 __pxrReserved__ ::TfNotice::_Send(pxrInternal_v0_23 __pxrReserved__ ::TfWeakBase const*, void const*, std::type_info const&) const + 112

28 libpxr_sdf.dylib 0x0000000113b4a058 pxrInternal_v0_23 __pxrReserved__ ::Sdf_ChangeManager::_SendNotices(pxrInternal_v0_23 __pxrReserved__ ::Sdf_ChangeManager::_Data*) + 916

29 libpxr_sdf.dylib 0x0000000113b49a4c pxrInternal_v0_23 __pxrReserved__ ::Sdf_ChangeManager::_CloseChangeBlock(pxrInternal_v0_23 __pxrReserved__ ::SdfChangeBlock const*, void const*) + 52

30 libpxr_usd.dylib 0x000000011b39bce8 pxrInternal_v0_23 __pxrReserved__ ::Usd_ListEditImpl<pxrInternal_v0_23 __pxrReserved__ ::UsdReferences, pxrInternal_v0_23 __pxrReserved__ ::SdfListEditorProxy<pxrInternal_v0_23 __pxrReserved__ ::SdfReferenceTypePolicy>>::Add(pxrInternal_v0_23 __pxrReserved__ ::UsdReferences const&, pxrInternal_v0_23 __pxrReserved__ ::SdfReference const&, pxrInternal_v0_23 __pxrReserved__ ::UsdListPosition) + 460

31 libpxr_usd.dylib 0x000000011b39c284 pxrInternal_v0_23 __pxrReserved__ ::UsdReferences::AddReference(std:: __1::basic_string<char, std::__ 1::char_traits<char>, std:: __1::allocator<char>> const&, pxrInternal_v0_23__ pxrReserved __::SdfLayerOffset const&, pxrInternal_v0_23__ pxrReserved__::UsdListPosition) + 168

```

---

<div class="post-metadata">

### Author: ![dhruvgovil](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.aousd.org/dhruvgovil/32/3_2.png) [@dhruvgovil](https://forum.aousd.org/u/dhruvgovil)
#### Post date: [September 5, 2023, 7:56pm UTC](https://forum.aousd.org/t/anyone-seeing-issues-with-usd-on-m1-macs/599/2 "2023-09-05T19:56:26Z")

</div>

Maybe someone who’s experienced the same can chime in, but we’ve been running USD on Arm in production for a few years without issues and without patches, including (recently) 23.8. maybe it can serve as a datapoint at least.

Edit: it shows up if running the USD code in many iterations inside the same session

I just tried this

```auto
import platform, sys
print(sys.version_info)
print(platform.processor())

from pxr import Usd
print(Usd.GetVersion())
s = Usd.Stage.CreateInMemory()
prim = s.DefinePrim('/asset')

prim.GetReferences().AddReference("/Users/dhruvgovil/Downloads/gramophone.usdz")

print("Works")

```

and got

```auto
sys.version_info(major=3, minor=10, micro=8, releaselevel='final', serial=0)
arm
(0, 23, 8)
Works

```

I tested on both macOS 13 and 14, compiled with both Xcode 14 and 15’s clang

---

<div class="post-metadata">

### Author: ![dhruvgovil](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.aousd.org/dhruvgovil/32/3_2.png) [@dhruvgovil](https://forum.aousd.org/u/dhruvgovil)
#### Post date: [September 5, 2023, 11:01pm UTC](https://forum.aousd.org/t/anyone-seeing-issues-with-usd-on-m1-macs/599/4 "2023-09-05T23:01:31Z")

</div>

Okay doing some more sleuthing here (hooray for Rez builds) with 40k iterations each

1. I tried going back to USD 22.8 and stepping forward, and can’t reproduce the crash for USD 22.8 through 23.2
2. I tried stepping back to 23.5 and get this but I don’t appear to get a segfault

```auto
Warning: in _ReportErrors at line 2885 of /Users/dhruvgovil/Projects/usd/pxr/usd/usd/stage.cpp -- In </asset>: Could not open asset @/Users/dhruvgovil/Downloads/gramophone.usdz@ for reference introduced by @anon:0x109e04800:tmp.usda@</asset> -- Corrupt asset @/Users/dhruvgovil/Downloads/gramophone.usdz[gramophone.usdc]@ - ignoring invalid specs: spec </> repeated, spec at index 2 has empty path, spec at index 3 has empty path, spec at index 4

... (repeated for every number in between)

spec at index 414 has empty path.. (recomposing stage on stage @anon:0x109e04800:tmp.usda@ <0x10b808200>)

```

1. I get the segfault on 23.8 sporadically. Running the same compiled universal lib with `arch -x86_64` doesn’t seem to reproduce the error.

This isn’t super scientific by any means. I’m just stepping through my different versions of USD where my dependency tree hasn’t changed, so only USD should have changed.

If I’m guessing it’s some regression in 23.5/23.8 that’s perhaps using some kind of semaphore that’s dependent on x86 ordering ?

@mtucker could you file an issue with Pixar?

---

<div class="post-metadata">

### Author: ![mtucker](https://avatars.discourse-cdn.com/v4/letter/m/54ee81/32.png) [@mtucker](https://forum.aousd.org/u/mtucker)
#### Post date: [September 6, 2023, 8:48pm UTC](https://forum.aousd.org/t/anyone-seeing-issues-with-usd-on-m1-macs/599/5 "2023-09-06T20:48:21Z")

</div>

Wow, thanks for the in-depth investigation Dhruv! I can certainly file an issue on github.

---

<div class="post-metadata">

### Author: ![mtucker](https://avatars.discourse-cdn.com/v4/letter/m/54ee81/32.png) [@mtucker](https://forum.aousd.org/u/mtucker)
#### Post date: [September 7, 2023, 1:34pm UTC](https://forum.aousd.org/t/anyone-seeing-issues-with-usd-on-m1-macs/599/6 "2023-09-07T13:34:46Z")

</div>

> <https://github.com/PixarAnimationStudios/OpenUSD/issues/2662>
>
> \### Description of Issue
> There seems to be a recently (between 23.02 and 23.08)… introduced race condition to USD composition on M1 builds. See https://forum.aousd.org/t/anyone-seeing-issues-with-usd-on-m1-macs/599 for some additional information.
> 
> \### Steps to Reproduce
> 1. Run the following python code (or something similar) many many times on an M1 Mac build of USD:
> \`\`\`
> s = Usd.Stage.CreateInMemory()
> prim = s.DefinePrim('/asset')
> prim.GetReferences().AddReference(asset\_file\_path)
> \`\`\`
> 2. Eventually get either a crash (in 23.08) or a runtime error (23.05)
> 
> \### System Information (OS, Hardware)
> MacOS 13, clang 14, M1 Mac
> 
> \### Package Versions
> 23.05, 23.08
> 
> \### Build Flags
> M1 arm64 builds