Crash when trying to assign file path to image node in LookdevX

[dtoshevcg]

Describe the bug A clear and concise description of what the bug is.

Maya crashes when trying to open the file picker from LookdevX to choose a file for an ND_image node using Maya USD 0.27.0

Steps to reproduce Steps to reproduce the behavior:

1. Open a new scene.
2. Create a new USD Stage.
3. Create a plane > Right-click > Duplicate to USD Stage. Delete or hide the original Maya plane.
4. Right-click on the plane > Assign new material > MaterialX > Standard Surface.
5. Right-click on the plane > Show in lookdevX.
6. Open up the shader and add a tiledimage node or image node (ND_tiledimage, ND_image materialx node).
7. Click the file loading icon. Maya will crash.

Expected behavior No crash

Attachments If applicable, add screenshots, sample files, etc to help explain your problem.

Specs (if applicable):

• OS & version [e.g. Windows 10] Arch Linux; Rocky 8.
• Compiler & version [e.g. gcc 11.2.1]
• Maya version [e.g. Maya 2024] Maya 2024
• Maya USD commit SHA [e.g. dev at caa921c1] 0.27.0 release
• Pixar USD commit SHA [e.g. dev at b85ddac2]

Additional context Add any other context about the problem here. Backtrace from GDB:

(gdb) bt
#0  0x0000000028a7aa20 in ?? ()
#1  0x00007ff398c0bf92 in MayaUsd_v0::ufe::UsdAttributeHolder::hasMetadata(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) const ()
   from /usr/autodesk/mayausd/maya2024/0.27.0_202402071410-bf4bd3e/mayausd/MayaUSD/plugin/adsk/plugin/../../../lib/libmayaUsd.so
#2  0x00007ff398c8d623 in MayaUsd_v0::ufe::UsdShaderAttributeHolder::hasMetadata(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) const ()
   from /usr/autodesk/mayausd/maya2024/0.27.0_202402071410-bf4bd3e/mayausd/MayaUSD/plugin/adsk/plugin/../../../lib/libmayaUsd.so
#3  0x00007ff3c4908659 in LookdevXUsd::UsdFileHandler::openFileDialog[abi:cxx11](std::shared_ptr<Ufe_v4::AttributeFilename> const&) const () from /usr/autodesk/lookdevx/maya2024/1.2.0/plug-ins/lookdevx/plug-ins/LookdevXMaya.so
#4  0x00007ff3c49e21d7 in ?? () from /usr/autodesk/lookdevx/maya2024/1.2.0/plug-ins/lookdevx/plug-ins/LookdevXMaya.so
#5  0x00007ff5526e0f1d in void doActivate<false>(QObject*, int, void**) () from /usr/autodesk/maya2024//lib/libQt5Core.so.5
#6  0x00007ff553c539bd in QAbstractButtonPrivate::emitPressed() () from /usr/autodesk/maya2024//lib/libQt5Widgets.so.5
#7  0x00007ff553c54295 in QAbstractButton::mousePressEvent(QMouseEvent*) () from /usr/autodesk/maya2024//lib/libQt5Widgets.so.5
#8  0x00007ff553ba662e in QWidget::event(QEvent*) () from /usr/autodesk/maya2024//lib/libQt5Widgets.so.5
#9  0x00007ff553b67a7f in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/autodesk/maya2024//lib/libQt5Widgets.so.5
#10 0x00007ff553b6ef29 in QApplication::notify(QObject*, QEvent*) () from /usr/autodesk/maya2024//lib/libQt5Widgets.so.5
#11 0x00007ff555f040bd in ?? () from /usr/autodesk/maya2024//lib/libExtensionLayer.so
#12 0x00007ff5526accfa in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/autodesk/maya2024//lib/libQt5Core.so.5
#13 0x00007ff553b6dac0 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool, bool) () from /usr/autodesk/maya2024//lib/libQt5Widgets.so.5
#14 0x00007ff553bbead8 in QWidgetWindow::handleMouseEvent(QMouseEvent*) () from /usr/autodesk/maya2024//lib/libQt5Widgets.so.5
#15 0x00007ff553bc1ad5 in QWidgetWindow::event(QEvent*) () from /usr/autodesk/maya2024//lib/libQt5Widgets.so.5
#16 0x00007ff553b67a7f in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/autodesk/maya2024//lib/libQt5Widgets.so.5
#17 0x00007ff555f040bd in ?? () from /usr/autodesk/maya2024//lib/libExtensionLayer.so
#18 0x00007ff5526accfa in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/autodesk/maya2024//lib/libQt5Core.so.5
#19 0x00007ff552b315e7 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () from /usr/autodesk/maya2024//lib/libQt5Gui.so.5
#20 0x00007ff552b08e9c in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/autodesk/maya2024//lib/libQt5Gui.so.5
#21 0x00007ff5361169ba in xcbSourceDispatch(_GSource*, int (*)(void*), void*) () from /usr/autodesk/maya2024//lib/libQt5XcbQpa.so.5
#22 0x00007ff54900fa31 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#23 0x00007ff54906ccc9 in ?? () from /usr/lib/libglib-2.0.so.0
#24 0x00007ff54900d0e2 in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#25 0x00007ff5527008c4 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/autodesk/maya2024//lib/libQt5Core.so.5
#26 0x00007ff5526ab88b in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/autodesk/maya2024//lib/libQt5Core.so.5
#27 0x00007ff5526b34cc in QCoreApplication::exec() () from /usr/autodesk/maya2024//lib/libQt5Core.so.5
#28 0x00007ff555eff324 in Tapplication::start() () from /usr/autodesk/maya2024//lib/libExtensionLayer.so
#29 0x000000000041a3fb in appmain() ()
#30 0x0000000000415500 in main ()

[wallworm]

Thanks for reporting this. We will look into it.