unofficial-webapp-office

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Also reported to the unofficial-webapp-todo developer (https://github.com/mxarc/unofficial-webapp-todo/issues/1) as well as the icloud-for-linux developer (https://github.com/cross-platform/icloud-for-linux/issues/24).

Just as an example, using Outlook, attempted form command line using QT_DEBUG_PLUGINS=1:

$ QT_DEBUG_PLUGINS=1 snap run unofficial-webapp-office.outlook

WARNING: cgroup v2 is not fully supported yet, proceeding with partial confinement
QFactoryLoader::QFactoryLoader() checking directory path "/snap/unofficial-webapp-office/46/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "/snap/unofficial-webapp-office/46/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqeglfs.so"
Found metadata in lib /snap/unofficial-webapp-office/46/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqeglfs.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "eglfs"
        ]
    },
    "className": "QEglFSIntegrationPlugin",
    "debug": false,
    "version": 329989
}


Got keys from plugin meta data ("eglfs")
QFactoryLoader::QFactoryLoader() looking at "/snap/unofficial-webapp-office/46/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqlinuxfb.so"
Found metadata in lib /snap/unofficial-webapp-office/46/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqlinuxfb.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "linuxfb"
        ]
    },
    "className": "QLinuxFbIntegrationPlugin",
    "debug": false,
    "version": 329989
}


Got keys from plugin meta data ("linuxfb")
QFactoryLoader::QFactoryLoader() looking at "/snap/unofficial-webapp-office/46/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqminimal.so"
Found metadata in lib /snap/unofficial-webapp-office/46/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqminimal.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "minimal"
        ]
    },
    "className": "QMinimalIntegrationPlugin",
    "debug": false,
    "version": 329989
}


Got keys from plugin meta data ("minimal")
QFactoryLoader::QFactoryLoader() looking at "/snap/unofficial-webapp-office/46/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqminimalegl.so"
Found metadata in lib /snap/unofficial-webapp-office/46/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqminimalegl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "minimalegl"
        ]
    },
    "className": "QMinimalEglIntegrationPlugin",
    "debug": false,
    "version": 329989
}


Got keys from plugin meta data ("minimalegl")
QFactoryLoader::QFactoryLoader() looking at "/snap/unofficial-webapp-office/46/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqoffscreen.so"
Found metadata in lib /snap/unofficial-webapp-office/46/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqoffscreen.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "offscreen"
        ]
    },
    "className": "QOffscreenIntegrationPlugin",
    "debug": false,
    "version": 329989
}


Got keys from plugin meta data ("offscreen")
QFactoryLoader::QFactoryLoader() looking at "/snap/unofficial-webapp-office/46/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqvnc.so"
Found metadata in lib /snap/unofficial-webapp-office/46/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqvnc.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "vnc"
        ]
    },
    "className": "QVncIntegrationPlugin",
    "debug": false,
    "version": 329989
}


Got keys from plugin meta data ("vnc")
QFactoryLoader::QFactoryLoader() looking at "/snap/unofficial-webapp-office/46/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so"
Found metadata in lib /snap/unofficial-webapp-office/46/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "xcb"
        ]
    },
    "className": "QXcbIntegrationPlugin",
    "debug": false,
    "version": 329989
}


Got keys from plugin meta data ("xcb")
QFactoryLoader::QFactoryLoader() checking directory path "/snap/unofficial-webapp-office/46/usr/lib/qt5/bin/platforms" ...
loaded library "/snap/unofficial-webapp-office/46/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so"
qt.qpa.screen: QXcbConnection: Could not connect to display :0
Could not connect to any X display.
QLibraryPrivate::unload succeeded on "/snap/unofficial-webapp-office/46/usr/lib/x86_64-linux-gnu/qt5/plugins/platforms/libqxcb.so" 

Runs on Xorg just fine. :)

I confirm the bug. For me the problem is when loading libqtwebengineplugin library:

loaded library "/snap/unofficial-webapp-office/46/usr/lib/x86_64-linux-gnu/qt5/qml/QtQuick/Controls/libqtquickcontrolsplugin.so" Found metadata in lib /snap/unofficial-webapp-office/46/usr/lib/x86_64-linux-gnu/qt5/qml/QtWebEngine/libqtwebengineplugin.so, metadata= { "IID": "org.qt-project.Qt.QQmlExtensionInterface/1.0", "MetaData": { }, "className": "QtWebEnginePlugin", "debug": false, "uri": [ "QtWebEngine" ], "version": 329989 }

loaded library "/snap/unofficial-webapp-office/46/usr/lib/x86_64-linux-gnu/qt5/qml/QtWebEngine/libqtwebengineplugin.so" [11029:11029:1127/110646.402067:FATAL:credentials.cc(295)] Check failed: 0 == sys_unshare(CLONE_NEWUSER). : Operation not permitted #0 0x7f5816b97aee #1 0x7f5816baa0e2 #2 0x7f5816bab45c #3 0x7f58177203db #4 0x7f58167b4527 #5 0x7f581645fd48 #6 0x7f5816463262 #7 0x7f5816251a9b #8 0x7f5816252bd5 #9 0x7f58161e74f1 QtWebEngineCore::BrowserContextAdapter::defaultContext() #10 0x7f582213a3b5 QQuickWebEngineProfile::defaultProfile() #11 0x7f5822141dba QQuickWebEngineViewPrivate::QQuickWebEngineViewPrivate() #12 0x7f5822142c9b QQuickWebEngineView::QQuickWebEngineView() #13 0x7f582237a27b #14 0x7f583dd59962 QQmlType::create() #15 0x7f583ddca146 QQmlObjectCreator::createInstance() #16 0x7f583ddcc3da QQmlObjectCreator::setPropertyBinding() #17 0x7f583ddcce11 QQmlObjectCreator::setupBindings() #18 0x7f583ddc9ba6 QQmlObjectCreator::populateInstance() #19 0x7f583ddca97c QQmlObjectCreator::createInstance() #20 0x7f583ddcdc6c QQmlObjectCreator::create() #21 0x7f583dd44408 QQmlComponentPrivate::beginCreate() #22 0x7f583dd4274f QQmlComponent::create() #23 0x560d35761c5a #24 0x7f583b902b97 __libc_start_main #25 0x560d35763ada

Fontconfig warning: FcPattern object weight does not accept value [0 205) Segmentation fault (core dumped)

I'on Linux 5.9.10-200.fc33.x86_64 #1 SMP Mon Nov 23 18:12:50 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

Yes, I am looking at options for supporting Wayland going forward.

Well, actually after some tries I have to change my bug report. For me the problem is not Wayland, the command above fails both for gnome on Wayland and Gnome on Xorg. It is a matter of permissions. Indeed if I do (notice the sudo)

sudo QT_DEBUG_PLUGINS=1 snap run unofficial-webapp-office.word then it works flawlessly (well modulo the other bugs already signaled, e.g. the fact that one has to login every time) both in Xorg and in Wayland. I use Fedora 33 with kernel 5.9.11-200.fc33.x86_64 and installed unofficial-webapp-office from snap