Getting custom layer data crashes DCC

[vinRosso]

Description of Issue

Getting the custom layer data from a layer created in Autodesk Bifrost raises an error.

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Steps to Reproduce

1. Create a simple layer like in the following image
   

2. Try to query the custom layer data from USD, it causes Maya to crash:

from pxr import Sdf

identifier = "anon:0x7f6b8c051af0:bifrost.usd"  # put here whatever the identifier is
layer = Sdf.Layer.FindOrOpen(identifier)
layer.customLayerData

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Stack Trace

  /usr/autodesk/mayausd/maya2024/0.29.0_202406120659-f8eb6c1/mayausd/USD/lib/python/pxr/Vt/_vt.so(+0x9cc871) [0x7f2c24dcc871]
  boost::python::converter::detail::arg_to_python_base::arg_to_python_base(void const volatile*, boost::python::converter::registration const&)
  boost::python::api::object pxrInternal_v0_22__pxrReserved__::TfPyObject<pxrInternal_v0_22__pxrReserved__::VtValue>(pxrInternal_v0_22__pxrReserved__::VtValue const&, bool)
  /usr/autodesk/mayausd/maya2024/0.29.0_202406120659-f8eb6c1/mayausd/USD/lib/python/pxr/Vt/_vt.so(+0x9c62d2) [0x7f2c24dc62d2]
  boost::python::objects::caller_py_function_impl<boost::python::detail::caller<pxrInternal_v0_22__pxrReserved__::VtDictionary (pxrInternal_v0_22__pxrReserved__::SdfLayer::*)() const, boost::python::default_call_policies, boost::mpl::vector2<pxrInternal_v0_22__pxrReserved__::VtDictionary, pxrInternal_v0_22__pxrReserved__::SdfLayer&> > >::operator()(_object*, _object*)
  boost::python::objects::function::call(_object*, _object*) const
  /usr/autodesk/mayausd/maya2024/0.29.0_202406120659-f8eb6c1/mayausd/USD/lib/python/pxr/Tf/../../../libboost_python310.so.1.76.0(+0x1fcf6) [0x7f2c326accf6]
  boost::python::detail::exception_handler::operator()(boost::function0<void> const&) const
  boost::detail::function::function_obj_invoker2<boost::_bi::bind_t<bool, boost::python::detail::translate_exception<pxrInternal_v0_22__pxrReserved__::TfBaseException, void (*)(pxrInternal_v0_22__pxrReserved__::TfBaseException const&)>, boost::_bi::list3<boost::arg<1>, boost::arg<2>, boost::_bi::value<void (*)(pxrInternal_v0_22__pxrReserved__::TfBaseException const&)> > >, bool, boost::python::detail::exception_handler const&, boost::function0<void> const&>::invoke(boost::detail::function::function_buffer&, boost::python::detail::exception_handler const&, boost::function0<void> const&)
  boost::python::handle_exception_impl(boost::function0<void>)
  /usr/autodesk/mayausd/maya2024/0.29.0_202406120659-f8eb6c1/mayausd/USD/lib/python/pxr/Tf/../../../libboost_python310.so.1.76.0(+0x1d722) [0x7f2c326aa722]
  _PyObject_Call
  boost::python::objects::full_py_function_impl<pxrInternal_v0_22__pxrReserved__::Tf_ModuleProcessor::_InvokeWithErrorHandling, boost::mpl::vector1<_object*> >::operator()(_object*, _object*)
  boost::python::objects::function::call(_object*, _object*) const
  /usr/autodesk/mayausd/maya2024/0.29.0_202406120659-f8eb6c1/mayausd/USD/lib/python/pxr/Tf/../../../libboost_python310.so.1.76.0(+0x1fcf6) [0x7f2c326accf6]
  boost::python::detail::exception_handler::operator()(boost::function0<void> const&) const
  boost::detail::function::function_obj_invoker2<boost::_bi::bind_t<bool, boost::python::detail::translate_exception<pxrInternal_v0_22__pxrReserved__::TfBaseException, void (*)(pxrInternal_v0_22__pxrReserved__::TfBaseException const&)>, boost::_bi::list3<boost::arg<1>, boost::arg<2>, boost::_bi::value<void (*)(pxrInternal_v0_22__pxrReserved__::TfBaseException const&)> > >, bool, boost::python::detail::exception_handler const&, boost::function0<void> const&>::invoke(boost::detail::function::function_buffer&, boost::python::detail::exception_handler const&, boost::function0<void> const&)
  boost::python::handle_exception_impl(boost::function0<void>)
  /usr/autodesk/mayausd/maya2024/0.29.0_202406120659-f8eb6c1/mayausd/USD/lib/python/pxr/Tf/../../../libboost_python310.so.1.76.0(+0x1d722) [0x7f2c326aa722]
  _PyObject_MakeTpCall
  /usr/autodesk/maya2024/lib/libpython3.10.so.1.0(+0xcd540) [0x7f2c786cd540]
  _PyObject_GenericGetAttrWithDict
  PyObject_GetAttr
  _PyEval_EvalFrameDefault
  /usr/autodesk/maya2024/lib/libpython3.10.so.1.0(+0x1bda24) [0x7f2c787bda24]
  PyEval_EvalCode
  TpythonInterpreter::executeCommand(Tstring const&, bool, bool, TinterpreterResult*)
  /usr/autodesk/maya2024/lib/libExtensionLayer.so(+0x36985a) [0x7f2c8556985a]
  TidleAction::preDoIdleAction(Tevent const&)
  /usr/autodesk/maya2024/lib/libExtensionLayer.so(+0x2fbcf7) [0x7f2c854fbcf7]
  TeventHandler::doIdles()
  /usr/autodesk/maya2024/lib/libExtensionLayer.so(+0x317155) [0x7f2c85517155]
  QObject::event(QEvent*)
  QApplicationPrivate::notify_helper(QObject*, QEvent*)
  /usr/autodesk/maya2024/lib/libExtensionLayer.so(+0x3040bd) [0x7f2c855040bd]
  QCoreApplication::notifyInternal2(QObject*, QEvent*)
  QTimerInfoList::activateTimers()
  /usr/autodesk/maya2024/lib/libQt5Core.so.5(+0x300564) [0x7f2c81d00564]
  g_main_context_dispatch
  /lib64/libglib-2.0.so.0(+0xa9508) [0x7f2c7796f508]

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System Information

Maya version: 2024.2
Bifrost version: 2.10.0.0
Maya USD version: 0.29.0

[jesschimein]

Filed as internal issue #USD-9920

[sunyab]

Hi @vinRosso, I'm unable to reproduce this in a standalone OpenUSD build and we're unable to debug issues in specific DCCs. If you haven't already, I'd recommend you file an issue on Autodesk's maya-usd repository to get help there.

If the maintainers do discover an issue in OpenUSD itself we can help diagnose and fix the problem then. Closing out in the interim, thanks!