Nixpkgs: maestral-qt and others: qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.

Created on 15 Sep 2020 · 7Comments · Source: NixOS/nixpkgs

Describe the bug

When running the maestral_qt executable, I get a core dump.
This started to happen after updating my nixpkgs flake.lock from 63e11623578aaaf13db496c3069460ea49901277 to 9232ca2ac1d120526c30f1f90a69fe8db23437c8.

To Reproduce
Steps to reproduce the behavior:

Use nixpkgs 9232ca2ac1d120526c30f1f90a69fe8db23437c8
Install maestral-gui on Linux
Run maestral_qt

Expected behavior

Program should work and not crash.

Additional context

$ QT_DEBUG_PLUGINS=1 maestral_qt
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/bs03sg8b0gq2zr4v252hh9psp780qj5q-python3-3.8.5/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/4vdyqzhfcs5zyf4gxh2k13wk5bdc2f5z-maestral-qt-1.1.0/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/iwpbnf39fhwx8blysa9q9hc4v09yxmq3-python3.8-nose-1.3.7/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/ayzm6ir9icrdl05azpwxlhcv4gxwqzsj-python3.8-coverage-5.2.1/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/s78f5giv8m77njsxig420s6568jsnfxl-python3.8-pytest-5.4.3/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/8wf8ivlli0j1wnnwbc4ymnbfqwyqyjyr-python3.8-setuptools-47.3.1/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/v9547fjhl16rfj4yqdd3bnx60kwqgkgd-python3.8-markdown2-2.3.6/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/lkwkbaqgglbcz5pck62jg6b0x7vf4wb6-python3.8-maestral-1.1.0/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/b89babrahxcn4r320viqhjvp07sa339l-python3.8-chardet-3.0.4/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/yzavpirck4ayab5saarixnh4gh0s57br-python3.8-pbr-5.4.5/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/bsy3zvvwc1ikx7v66l461hnqqikz03ng-python3.8-keyring-21.3.1/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/5i40ai0xiq0w30sy6hsl09xm6zgr9vwi-python3.8-Pyro5-5.11/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/kzyg18c3j7kjbi3sbshd957m710djfg3-python3.8-watchdog-0.10.3/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/cjpazii6x2fz9a0j723r6s1qcj1vr90q-python3.8-PyQt5.sip-4.19.22/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/rlck717m6zaq6pj546146ngcg6k6d762-qtdeclarative-5.15.0-bin/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/bzqj563g50wws2f4jg8aspjpqvqrwd2a-python3.8-PyQt5-5.14.2/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/home/frijters/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/f5b1y8x3rh62y6yw7zal8z8l4cv2by8n-terminator-1.92/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/3y2wb1cpvf8nks9lkh612bm1l2d1qig9-cairo-1.16.0-dev/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/3fz0y9fcpq53p5lk6l0qbfmqixp3finr-freetype-2.10.2-dev/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/ba05xi32q6zjcn6niad1zs1adqylwcr7-bzip2-1.0.6.0.1-bin/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/sp88r6xc325pmj19cbagk474d4k11bp7-libpng-apng-1.6.37-dev/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/hlm1kmkigzf5qa3j113r8jm63nfqhdjd-fontconfig-2.13.92-bin/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/a2f9frivgpxcbm1fkr6qhgxd0002k19a-expat-2.2.8-dev/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/lw6mlp0vh41xfpawlkh8w84m7qfr430l-glib-2.64.5-dev/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/ggngxyl69bjiqvr2nkpcw04523393lcx-gettext-0.21/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/fdi21x5yfqvhf2jm7gvkbprsjb692r39-glib-2.64.5-bin/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/home/frijters/.nix-profile/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/run/wrappers/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/etc/profiles/per-user/frijters/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/var/nix/profiles/default/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/run/current-system/sw/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/wy7cj276rxhil4wkxmmlpgqvk5x8cdkh-qtwayland-5.14.2-bin/lib/qt-5.14.2/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "/nix/store/wy7cj276rxhil4wkxmmlpgqvk5x8cdkh-qtwayland-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqwayland-egl.so"
Found metadata in lib /nix/store/wy7cj276rxhil4wkxmmlpgqvk5x8cdkh-qtwayland-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqwayland-egl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland-egl"
        ]
    },
    "archreq": 0,
    "className": "QWaylandEglPlatformIntegrationPlugin",
    "debug": false,
    "version": 331264
}


Got keys from plugin meta data ("wayland-egl")
QFactoryLoader::QFactoryLoader() looking at "/nix/store/wy7cj276rxhil4wkxmmlpgqvk5x8cdkh-qtwayland-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqwayland-generic.so"
Found metadata in lib /nix/store/wy7cj276rxhil4wkxmmlpgqvk5x8cdkh-qtwayland-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqwayland-generic.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland"
        ]
    },
    "archreq": 0,
    "className": "QWaylandIntegrationPlugin",
    "debug": false,
    "version": 331264
}


Got keys from plugin meta data ("wayland")
QFactoryLoader::QFactoryLoader() looking at "/nix/store/wy7cj276rxhil4wkxmmlpgqvk5x8cdkh-qtwayland-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqwayland-xcomposite-egl.so"
Found metadata in lib /nix/store/wy7cj276rxhil4wkxmmlpgqvk5x8cdkh-qtwayland-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqwayland-xcomposite-egl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland-xcomposite-egl"
        ]
    },
    "archreq": 0,
    "className": "QWaylandXCompositeEglPlatformIntegrationPlugin",
    "debug": false,
    "version": 331264
}


Got keys from plugin meta data ("wayland-xcomposite-egl")
QFactoryLoader::QFactoryLoader() looking at "/nix/store/wy7cj276rxhil4wkxmmlpgqvk5x8cdkh-qtwayland-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqwayland-xcomposite-glx.so"
Found metadata in lib /nix/store/wy7cj276rxhil4wkxmmlpgqvk5x8cdkh-qtwayland-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqwayland-xcomposite-glx.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland-xcomposite-glx"
        ]
    },
    "archreq": 0,
    "className": "QWaylandXCompositeGlxPlatformIntegrationPlugin",
    "debug": false,
    "version": 331264
}


Got keys from plugin meta data ("wayland-xcomposite-glx")
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/hmaq5b8hj3hk7xdgknj2h58qknrbxb23-qtdeclarative-5.14.2-bin/lib/qt-5.14.2/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/s7vbwk79awc5m0dpl13c8gyaik1l9h4q-qtsvg-5.14.2-bin/lib/qt-5.14.2/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "/nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqeglfs.so"
Found metadata in lib /nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqeglfs.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "eglfs"
        ]
    },
    "archreq": 0,
    "className": "QEglFSIntegrationPlugin",
    "debug": false,
    "version": 331264
}


Got keys from plugin meta data ("eglfs")
QFactoryLoader::QFactoryLoader() looking at "/nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqlinuxfb.so"
Found metadata in lib /nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqlinuxfb.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "linuxfb"
        ]
    },
    "archreq": 0,
    "className": "QLinuxFbIntegrationPlugin",
    "debug": false,
    "version": 331264
}


Got keys from plugin meta data ("linuxfb")
QFactoryLoader::QFactoryLoader() looking at "/nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqminimal.so"
Found metadata in lib /nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqminimal.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "minimal"
        ]
    },
    "archreq": 0,
    "className": "QMinimalIntegrationPlugin",
    "debug": false,
    "version": 331264
}


Got keys from plugin meta data ("minimal")
QFactoryLoader::QFactoryLoader() looking at "/nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqminimalegl.so"
Found metadata in lib /nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqminimalegl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "minimalegl"
        ]
    },
    "archreq": 0,
    "className": "QMinimalEglIntegrationPlugin",
    "debug": false,
    "version": 331264
}


Got keys from plugin meta data ("minimalegl")
QFactoryLoader::QFactoryLoader() looking at "/nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqoffscreen.so"
Found metadata in lib /nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqoffscreen.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "offscreen"
        ]
    },
    "archreq": 0,
    "className": "QOffscreenIntegrationPlugin",
    "debug": false,
    "version": 331264
}


Got keys from plugin meta data ("offscreen")
QFactoryLoader::QFactoryLoader() looking at "/nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqvnc.so"
Found metadata in lib /nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqvnc.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "vnc"
        ]
    },
    "archreq": 0,
    "className": "QVncIntegrationPlugin",
    "debug": false,
    "version": 331264
}


Got keys from plugin meta data ("vnc")
QFactoryLoader::QFactoryLoader() looking at "/nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqxcb.so"
Found metadata in lib /nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqxcb.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "xcb"
        ]
    },
    "archreq": 0,
    "className": "QXcbIntegrationPlugin",
    "debug": false,
    "version": 331264
}


Got keys from plugin meta data ("xcb")
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/bs03sg8b0gq2zr4v252hh9psp780qj5q-python3-3.8.5/bin/platforms" ...
Cannot load library /nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqxcb.so: (/nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/../../../../../p0xr68q9fiixq7jnbd7vc2xyilckiz5s-qtbase-5.14.2/lib/libQt5XcbQpa.so.5: undefined symbol: _ZN22QWindowSystemInterface16handleMouseEventINS_15DefaultDeliveryEEEvP7QWindowmRK7QPointFS6_6QFlagsIN2Qt11MouseButtonEES9_N6QEvent4TypeES7_INS8_16KeyboardModifierEENS8_16MouseEventSourceE, version Qt_5_PRIVATE_API)
QLibraryPrivate::loadPlugin failed on "/nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqxcb.so" : "Cannot load library /nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqxcb.so: (/nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/../../../../../p0xr68q9fiixq7jnbd7vc2xyilckiz5s-qtbase-5.14.2/lib/libQt5XcbQpa.so.5: undefined symbol: _ZN22QWindowSystemInterface16handleMouseEventINS_15DefaultDeliveryEEEvP7QWindowmRK7QPointFS6_6QFlagsIN2Qt11MouseButtonEES9_N6QEvent4TypeES7_INS8_16KeyboardModifierEENS8_16MouseEventSourceE, version Qt_5_PRIVATE_API)"
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, xcb.

Aborted (core dumped)

Notify maintainers

@peterhoeg probably the issue is with a Qt update, but do you see this problem?

Metadata
Please run nix-shell -p nix-info --run "nix-info -m" and paste the result.

 - system: `"x86_64-linux"`
 - host os: `Linux 5.8.9, NixOS, 21.03.20200915.9232ca2 (Okapi)`
 - multi-user?: `yes`
 - sandbox: `yes`
 - version: `nix-env (Nix) 3.0pre20200829_f156513`
 - channels(frijters): `"nixos-unstable-20.09pre223023.fce7562cf46"`
 - channels(root): `"nixos, nixos-unstable-20.09pre225264.683c68232e9"`
 - nixpkgs: `/nix/var/nix/profiles/per-user/root/channels/nixos`

Maintainer information:

# a list of nixpkgs attributes affected by the problem
attribute: maestral-gui
# a list of nixos modules affected by the problem
module:

bug python qkde

Source

SFrijters

👍1

All 7 comments

Bisected to c1a0dfadea3c0f56d5213a677dbbd7b3e89ee98f.
To me it looks like the removal of the let binding libsForQt5 = pkgs.libsForQt514; affects pyqt5 = libsForQt5.callPackage ../development/python-modules/pyqt/5.x.nix { pythonPackages = self; };, which affects maestral-qt transitively. There are some more use sites of libsForQt5 in python-packages.nix so probably more packages could be affected.
@petabyteboy , any thoughts on this?

SFrijters on 15 Sep 2020

ksshaskpass and wireshark-qt fail in a similar fashion, failing to find the "xcb" plugin.

qt.qpa.xcb: could not connect to display 
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: wayland-org.kde.kwin.qpa, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, xcb.

error: /nix/store/b5vw4szbxb95n6v7cf1rjhp36jbfvvlx-ksshaskpass-5.17.5/bin/ksshaskpass died of signal 6
error: unable to read askpass response from '/nix/store/b5vw4szbxb95n6v7cf1rjhp36jbfvvlx-ksshaskpass-5.17.5/bin/ksshaskpass'

But this even happens in release-20.03 while the bisected commit is only part of unstable, so not sure whether this is the same bug.

schmittlauch on 16 Sep 2020

Same issue with calibre

$ QT_DEBUG_PLUGINS=1 calibre
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/bqg8xfijzr2rs31m2sq8ckzwqwmsqz7n-poppler-utils-20.08.0/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/home/ao/doom-emacs/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/a6m8gph3qc5cq0jg1mrp11w6l3603jfh-swaybg-1.0/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/run/wrappers/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/home/ao/.nix-profile/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/etc/profiles/per-user/ao/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/var/nix/profiles/default/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/run/current-system/sw/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "/run/current-system/sw/lib/qt-5.15.0/plugins/platforms/libqwayland-egl.so"
Found metadata in lib /nix/store/q8sika34x6g080a0d9pkk6zlcld5grdl-qtwayland-5.15.0-bin/lib/qt-5.15.0/plugins/platforms/libqwayland-egl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland-egl"
        ]
    },
    "archreq": 0,
    "className": "QWaylandEglPlatformIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("wayland-egl")
QFactoryLoader::QFactoryLoader() looking at "/run/current-system/sw/lib/qt-5.15.0/plugins/platforms/libqwayland-generic.so"
Found metadata in lib /nix/store/q8sika34x6g080a0d9pkk6zlcld5grdl-qtwayland-5.15.0-bin/lib/qt-5.15.0/plugins/platforms/libqwayland-generic.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland"
        ]
    },
    "archreq": 0,
    "className": "QWaylandIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("wayland")
QFactoryLoader::QFactoryLoader() looking at "/run/current-system/sw/lib/qt-5.15.0/plugins/platforms/libqwayland-xcomposite-egl.so"
Found metadata in lib /nix/store/q8sika34x6g080a0d9pkk6zlcld5grdl-qtwayland-5.15.0-bin/lib/qt-5.15.0/plugins/platforms/libqwayland-xcomposite-egl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland-xcomposite-egl"
        ]
    },
    "archreq": 0,
    "className": "QWaylandXCompositeEglPlatformIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("wayland-xcomposite-egl")
QFactoryLoader::QFactoryLoader() looking at "/run/current-system/sw/lib/qt-5.15.0/plugins/platforms/libqwayland-xcomposite-glx.so"
Found metadata in lib /nix/store/q8sika34x6g080a0d9pkk6zlcld5grdl-qtwayland-5.15.0-bin/lib/qt-5.15.0/plugins/platforms/libqwayland-xcomposite-glx.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland-xcomposite-glx"
        ]
    },
    "archreq": 0,
    "className": "QWaylandXCompositeGlxPlatformIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("wayland-xcomposite-glx")
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/wy7cj276rxhil4wkxmmlpgqvk5x8cdkh-qtwayland-5.14.2-bin/lib/qt-5.14.2/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "/nix/store/wy7cj276rxhil4wkxmmlpgqvk5x8cdkh-qtwayland-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqwayland-egl.so"
Found metadata in lib /nix/store/wy7cj276rxhil4wkxmmlpgqvk5x8cdkh-qtwayland-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqwayland-egl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland-egl"
        ]
    },
    "archreq": 0,
    "className": "QWaylandEglPlatformIntegrationPlugin",
    "debug": false,
    "version": 331264
}


Got keys from plugin meta data ("wayland-egl")
QFactoryLoader::QFactoryLoader() looking at "/nix/store/wy7cj276rxhil4wkxmmlpgqvk5x8cdkh-qtwayland-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqwayland-generic.so"
Found metadata in lib /nix/store/wy7cj276rxhil4wkxmmlpgqvk5x8cdkh-qtwayland-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqwayland-generic.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland"
        ]
    },
    "archreq": 0,
    "className": "QWaylandIntegrationPlugin",
    "debug": false,
    "version": 331264
}


Got keys from plugin meta data ("wayland")
QFactoryLoader::QFactoryLoader() looking at "/nix/store/wy7cj276rxhil4wkxmmlpgqvk5x8cdkh-qtwayland-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqwayland-xcomposite-egl.so"
Found metadata in lib /nix/store/wy7cj276rxhil4wkxmmlpgqvk5x8cdkh-qtwayland-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqwayland-xcomposite-egl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland-xcomposite-egl"
        ]
    },
    "archreq": 0,
    "className": "QWaylandXCompositeEglPlatformIntegrationPlugin",
    "debug": false,
    "version": 331264
}


Got keys from plugin meta data ("wayland-xcomposite-egl")
QFactoryLoader::QFactoryLoader() looking at "/nix/store/wy7cj276rxhil4wkxmmlpgqvk5x8cdkh-qtwayland-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqwayland-xcomposite-glx.so"
Found metadata in lib /nix/store/wy7cj276rxhil4wkxmmlpgqvk5x8cdkh-qtwayland-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqwayland-xcomposite-glx.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland-xcomposite-glx"
        ]
    },
    "archreq": 0,
    "className": "QWaylandXCompositeGlxPlatformIntegrationPlugin",
    "debug": false,
    "version": 331264
}


Got keys from plugin meta data ("wayland-xcomposite-glx")
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/hmaq5b8hj3hk7xdgknj2h58qknrbxb23-qtdeclarative-5.14.2-bin/lib/qt-5.14.2/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/s7vbwk79awc5m0dpl13c8gyaik1l9h4q-qtsvg-5.14.2-bin/lib/qt-5.14.2/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "/nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqeglfs.so"
Found metadata in lib /nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqeglfs.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "eglfs"
        ]
    },
    "archreq": 0,
    "className": "QEglFSIntegrationPlugin",
    "debug": false,
    "version": 331264
}


Got keys from plugin meta data ("eglfs")
QFactoryLoader::QFactoryLoader() looking at "/nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqlinuxfb.so"
Found metadata in lib /nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqlinuxfb.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "linuxfb"
        ]
    },
    "archreq": 0,
    "className": "QLinuxFbIntegrationPlugin",
    "debug": false,
    "version": 331264
}


Got keys from plugin meta data ("linuxfb")
QFactoryLoader::QFactoryLoader() looking at "/nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqminimal.so"
Found metadata in lib /nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqminimal.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "minimal"
        ]
    },
    "archreq": 0,
    "className": "QMinimalIntegrationPlugin",
    "debug": false,
    "version": 331264
}


Got keys from plugin meta data ("minimal")
QFactoryLoader::QFactoryLoader() looking at "/nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqminimalegl.so"
Found metadata in lib /nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqminimalegl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "minimalegl"
        ]
    },
    "archreq": 0,
    "className": "QMinimalEglIntegrationPlugin",
    "debug": false,
    "version": 331264
}


Got keys from plugin meta data ("minimalegl")
QFactoryLoader::QFactoryLoader() looking at "/nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqoffscreen.so"
Found metadata in lib /nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqoffscreen.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "offscreen"
        ]
    },
    "archreq": 0,
    "className": "QOffscreenIntegrationPlugin",
    "debug": false,
    "version": 331264
}


Got keys from plugin meta data ("offscreen")
QFactoryLoader::QFactoryLoader() looking at "/nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqvnc.so"
Found metadata in lib /nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqvnc.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "vnc"
        ]
    },
    "archreq": 0,
    "className": "QVncIntegrationPlugin",
    "debug": false,
    "version": 331264
}


Got keys from plugin meta data ("vnc")
QFactoryLoader::QFactoryLoader() looking at "/nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqxcb.so"
Found metadata in lib /nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqxcb.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "xcb"
        ]
    },
    "archreq": 0,
    "className": "QXcbIntegrationPlugin",
    "debug": false,
    "version": 331264
}


Got keys from plugin meta data ("xcb")
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/bs03sg8b0gq2zr4v252hh9psp780qj5q-python3-3.8.5/bin/platforms" ...
Cannot load library /nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqxcb.so: (/nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/../../../../../p0xr68q9fiixq7jnbd7vc2xyilckiz5s-qtbase-5.14.2/lib/libQt5XcbQpa.so.5: undefined symbol: _ZN22QWindowSystemInterface16handleMouseEventINS_15DefaultDeliveryEEEvP7QWindowmRK7QPointFS6_6QFlagsIN2Qt11MouseButtonEES9_N6QEvent4TypeES7_INS8_16KeyboardModifierEENS8_16MouseEventSourceE, version Qt_5_PRIVATE_API)
QLibraryPrivate::loadPlugin failed on "/nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqxcb.so" : "Cannot load library /nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/libqxcb.so: (/nix/store/gm1s9lnk2xkii2gj3qwddb93ss8gcg38-qtbase-5.14.2-bin/lib/qt-5.14.2/plugins/platforms/../../../../../p0xr68q9fiixq7jnbd7vc2xyilckiz5s-qtbase-5.14.2/lib/libQt5XcbQpa.so.5: undefined symbol: _ZN22QWindowSystemInterface16handleMouseEventINS_15DefaultDeliveryEEEvP7QWindowmRK7QPointFS6_6QFlagsIN2Qt11MouseButtonEES9_N6QEvent4TypeES7_INS8_16KeyboardModifierEENS8_16MouseEventSourceE, version Qt_5_PRIVATE_API)"
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, xcb.

[1]    3176 abort (core dumped)  calibre

You should leave this issue open; make it a tracking issue for the bug.

galagora on 16 Sep 2020

👍1

c1a0dfa has been reverted in a4e50bb.

SFrijters on 16 Sep 2020

🎉1

maestral has been updated and fixed in 6dad7ddb8cf and preceding commits.

SFrijters on 22 Sep 2020

Fixed by https://github.com/NixOS/nixpkgs/pull/98197

peterhoeg on 25 Sep 2020

Hi, I get the same error when trying to open kmail

> kmail                    
QFactoryLoader::QFactoryLoader() checking directory path "/home/knut/.cargo/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/run/wrappers/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/home/knut/.nix-profile/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/etc/profiles/per-user/knut/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/var/nix/profiles/default/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/run/current-system/sw/lib/qt-5.15.0/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/0xv6fhh8r1d904vfvi3yx8jrza176adb-kmail-20.08.1/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/ayl817ks1y7z3skyc5szzpdilzqhlnzf-kdepim-addons-20.08.1/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/ramvizidaiwbxlbl4lwnzdjzpqd5qfzy-mailcommon-20.08.1/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/q68381n4p2hgb3lvlpnxrl84h75id5ny-messagelib-20.08.1/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/04yl5j6s9sjivqj39i3dgva5w4pwvch5-libksieve-20.08.1/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/m4nyijwy2ajmhx7wik9gc7dxnpdv12si-kmailtransport-20.08.1/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/wk1sv6ai7xd9sx10r2q4r7crf95nbn88-kmail-account-wizard-20.08.1/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/bi1v4i7qmk4c71cxhgr1q543hczfzp0r-pimcommon-20.08.1/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/safb36mzij04jqv789i6cs5dmpbbkwlw-libkdepim-20.08.1/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/9vy7akg1rbpz186kg2s4b7zlv9cz9f6p-kldap-20.08.1/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/lis9mygm4xh9dswzyma8axb93jy4vbib-akonadi-contacts-20.08.1/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/id007lcgjc0ibbzzsfykihbg0il51nd4-kpimtextedit-20.08.1/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/2j8zp11lpbhcx4gfzcx7igbhh2sqf4dh-akonadi-search-20.08.1/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/mll8w86k769as5ipmf4bdqc7ys9cv7xb-akonadi-mime-20.08.1/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/ijyly4vg3ihjcmi7k9i0fprcg1h8ibll-akonadi-20.08.1/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/0r7p8k1a54qii9cqm5q3kgwfph060fkg-frameworkintegration-5.73.0-bin/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/dhlwk36kszf85nn8cjq218qqvv6lnbdw-kio-5.73.0/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/pq1s0mr03044apdv7fabfqbs31mhfm66-phonon-4.11.1/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/jbssk402yg4jq7wyg8qlscq5nhaszpf7-kxmlgui-5.73.0-bin/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/vbilxgfh89j7dkljsksj65aiyy1x9wv7-ktextwidgets-5.73.0-bin/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/gniz538sl3ckpbsad88f7215p10cm8nw-kcompletion-5.73.0/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/wcz27qm0w827zqkqmd9yizl27v9zxv68-sonnet-5.73.0-bin/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/3fc073vgwbq9afzpbrif7dw0gmp828x3-kglobalaccel-5.73.0-bin/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/lci4lkjd7i6ssarr5ha6c7c3iy0kw32l-kwindowsystem-5.73.0/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/3k61x09831872w5i5b7w352w9sxzs72w-kiconthemes-5.73.0-bin/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/dlrlj9xrfyb0wqbkbwhjyqa5ai73fzdv-kitemviews-5.73.0/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/a1dbn9i2hjy1316p2w6nl135fvmb7z15-kconfigwidgets-5.73.0/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/k7ldjb0x1rsnmjdxq27sf3lavqma1h6y-kguiaddons-5.73.0/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/am39h00qdis4slxlba8qcmm01f2ccx57-ki18n-5.73.0-bin/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/w4gwz69zlcffx9x3xvk5xj3lwdy9ayq9-kwidgetsaddons-5.73.0/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/487f8bwikqzmnvmg912idx5j76c3qm8s-kauth-5.73.0/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/yciwjjrq04qhqj0lpvvxbwssa0ynwzyi-qttools-5.12.7-bin/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/v89aar7qdrjq5z5q8n34f2z53a4bji8m-qtwayland-5.12.7-bin/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "/nix/store/v89aar7qdrjq5z5q8n34f2z53a4bji8m-qtwayland-5.12.7-bin/lib/qt-5.12.7/plugins/platforms/libqwayland-egl.so"
Found metadata in lib /nix/store/v89aar7qdrjq5z5q8n34f2z53a4bji8m-qtwayland-5.12.7-bin/lib/qt-5.12.7/plugins/platforms/libqwayland-egl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland-egl"
        ]
    },
    "archreq": 0,
    "className": "QWaylandEglPlatformIntegrationPlugin",
    "debug": false,
    "version": 330752
}


Got keys from plugin meta data ("wayland-egl")
QFactoryLoader::QFactoryLoader() looking at "/nix/store/v89aar7qdrjq5z5q8n34f2z53a4bji8m-qtwayland-5.12.7-bin/lib/qt-5.12.7/plugins/platforms/libqwayland-generic.so"
Found metadata in lib /nix/store/v89aar7qdrjq5z5q8n34f2z53a4bji8m-qtwayland-5.12.7-bin/lib/qt-5.12.7/plugins/platforms/libqwayland-generic.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland"
        ]
    },
    "archreq": 0,
    "className": "QWaylandIntegrationPlugin",
    "debug": false,
    "version": 330752
}


Got keys from plugin meta data ("wayland")
QFactoryLoader::QFactoryLoader() looking at "/nix/store/v89aar7qdrjq5z5q8n34f2z53a4bji8m-qtwayland-5.12.7-bin/lib/qt-5.12.7/plugins/platforms/libqwayland-xcomposite-egl.so"
Found metadata in lib /nix/store/v89aar7qdrjq5z5q8n34f2z53a4bji8m-qtwayland-5.12.7-bin/lib/qt-5.12.7/plugins/platforms/libqwayland-xcomposite-egl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland-xcomposite-egl"
        ]
    },
    "archreq": 0,
    "className": "QWaylandXCompositeEglPlatformIntegrationPlugin",
    "debug": false,
    "version": 330752
}


Got keys from plugin meta data ("wayland-xcomposite-egl")
QFactoryLoader::QFactoryLoader() looking at "/nix/store/v89aar7qdrjq5z5q8n34f2z53a4bji8m-qtwayland-5.12.7-bin/lib/qt-5.12.7/plugins/platforms/libqwayland-xcomposite-glx.so"
Found metadata in lib /nix/store/v89aar7qdrjq5z5q8n34f2z53a4bji8m-qtwayland-5.12.7-bin/lib/qt-5.12.7/plugins/platforms/libqwayland-xcomposite-glx.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland-xcomposite-glx"
        ]
    },
    "archreq": 0,
    "className": "QWaylandXCompositeGlxPlatformIntegrationPlugin",
    "debug": false,
    "version": 330752
}


Got keys from plugin meta data ("wayland-xcomposite-glx")
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/sqyr1s8g1y2l2q7n3xyi36zy2sxlj2w3-qtdeclarative-5.12.7-bin/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/y66hwqinkdfl717l7yadbpl24h8p1br8-qtsvg-5.12.7-bin/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/kfbb1vmmjfkwrgmfv04d3x5b179lz47h-qtbase-5.12.7-bin/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "/nix/store/kfbb1vmmjfkwrgmfv04d3x5b179lz47h-qtbase-5.12.7-bin/lib/qt-5.12.7/plugins/platforms/libqeglfs.so"
Found metadata in lib /nix/store/kfbb1vmmjfkwrgmfv04d3x5b179lz47h-qtbase-5.12.7-bin/lib/qt-5.12.7/plugins/platforms/libqeglfs.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "eglfs"
        ]
    },
    "archreq": 0,
    "className": "QEglFSIntegrationPlugin",
    "debug": false,
    "version": 330752
}


Got keys from plugin meta data ("eglfs")
QFactoryLoader::QFactoryLoader() looking at "/nix/store/kfbb1vmmjfkwrgmfv04d3x5b179lz47h-qtbase-5.12.7-bin/lib/qt-5.12.7/plugins/platforms/libqlinuxfb.so"
Found metadata in lib /nix/store/kfbb1vmmjfkwrgmfv04d3x5b179lz47h-qtbase-5.12.7-bin/lib/qt-5.12.7/plugins/platforms/libqlinuxfb.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "linuxfb"
        ]
    },
    "archreq": 0,
    "className": "QLinuxFbIntegrationPlugin",
    "debug": false,
    "version": 330752
}


Got keys from plugin meta data ("linuxfb")
QFactoryLoader::QFactoryLoader() looking at "/nix/store/kfbb1vmmjfkwrgmfv04d3x5b179lz47h-qtbase-5.12.7-bin/lib/qt-5.12.7/plugins/platforms/libqminimal.so"
Found metadata in lib /nix/store/kfbb1vmmjfkwrgmfv04d3x5b179lz47h-qtbase-5.12.7-bin/lib/qt-5.12.7/plugins/platforms/libqminimal.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "minimal"
        ]
    },
    "archreq": 0,
    "className": "QMinimalIntegrationPlugin",
    "debug": false,
    "version": 330752
}


Got keys from plugin meta data ("minimal")
QFactoryLoader::QFactoryLoader() looking at "/nix/store/kfbb1vmmjfkwrgmfv04d3x5b179lz47h-qtbase-5.12.7-bin/lib/qt-5.12.7/plugins/platforms/libqminimalegl.so"
Found metadata in lib /nix/store/kfbb1vmmjfkwrgmfv04d3x5b179lz47h-qtbase-5.12.7-bin/lib/qt-5.12.7/plugins/platforms/libqminimalegl.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "minimalegl"
        ]
    },
    "archreq": 0,
    "className": "QMinimalEglIntegrationPlugin",
    "debug": false,
    "version": 330752
}


Got keys from plugin meta data ("minimalegl")
QFactoryLoader::QFactoryLoader() looking at "/nix/store/kfbb1vmmjfkwrgmfv04d3x5b179lz47h-qtbase-5.12.7-bin/lib/qt-5.12.7/plugins/platforms/libqoffscreen.so"
Found metadata in lib /nix/store/kfbb1vmmjfkwrgmfv04d3x5b179lz47h-qtbase-5.12.7-bin/lib/qt-5.12.7/plugins/platforms/libqoffscreen.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "offscreen"
        ]
    },
    "archreq": 0,
    "className": "QOffscreenIntegrationPlugin",
    "debug": false,
    "version": 330752
}


Got keys from plugin meta data ("offscreen")
QFactoryLoader::QFactoryLoader() looking at "/nix/store/kfbb1vmmjfkwrgmfv04d3x5b179lz47h-qtbase-5.12.7-bin/lib/qt-5.12.7/plugins/platforms/libqvnc.so"
Found metadata in lib /nix/store/kfbb1vmmjfkwrgmfv04d3x5b179lz47h-qtbase-5.12.7-bin/lib/qt-5.12.7/plugins/platforms/libqvnc.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "vnc"
        ]
    },
    "archreq": 0,
    "className": "QVncIntegrationPlugin",
    "debug": false,
    "version": 330752
}


Got keys from plugin meta data ("vnc")
QFactoryLoader::QFactoryLoader() looking at "/nix/store/kfbb1vmmjfkwrgmfv04d3x5b179lz47h-qtbase-5.12.7-bin/lib/qt-5.12.7/plugins/platforms/libqxcb.so"
Found metadata in lib /nix/store/kfbb1vmmjfkwrgmfv04d3x5b179lz47h-qtbase-5.12.7-bin/lib/qt-5.12.7/plugins/platforms/libqxcb.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "xcb"
        ]
    },
    "archreq": 0,
    "className": "QXcbIntegrationPlugin",
    "debug": false,
    "version": 330752
}


Got keys from plugin meta data ("xcb")
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/g0vklqgqxwgczyviwc2dzz98kzl7y9c3-breeze-qt5-5.18.5-bin/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/734frsxkvr5jf8wzx84w7ff5n1zqgax0-plasma-framework-5.73.0-bin/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/zs43y8qkkd1fq6fpp6qddgj7dkjfvkg5-plasma-workspace-5.18.5/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/m4baz2m94ynk5x9qid1iw88h3v0682yv-qtlocation-5.12.7-bin/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/az5n2g2pf7jlw11bgxlclbx41rwfswn7-libkscreen-5.18.5/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/2wrzvqjhkb5w5iar4iy8anx7i3xdd6d4-kwin-5.18.5-bin/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "/nix/store/2wrzvqjhkb5w5iar4iy8anx7i3xdd6d4-kwin-5.18.5-bin/lib/qt-5.12.7/plugins/platforms/KWinQpaPlugin.so"
Found metadata in lib /nix/store/2wrzvqjhkb5w5iar4iy8anx7i3xdd6d4-kwin-5.18.5-bin/lib/qt-5.12.7/plugins/platforms/KWinQpaPlugin.so, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "wayland-org.kde.kwin.qpa"
        ]
    },
    "archreq": 0,
    "className": "KWinIntegrationPlugin",
    "debug": false,
    "version": 330752
}


Got keys from plugin meta data ("wayland-org.kde.kwin.qpa")
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/cskg9akgv4b0ns7y75jm22c5m7dc9b57-qtvirtualkeyboard-5.12.7/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/7mys08iphs6319a0529lzgc15sb1wsiz-qtsensors-5.12.7-bin/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/shslwdvbx9l9njxck4dkyzkyg80l6fgn-ktexteditor-5.73.0-bin/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/wj0hqyrfscmj3ds881jzg5nryhvc5n6n-kscreenlocker-5.18.5/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/v9lbyq6grdaiwan8i52kj387h93rlpq1-kdelibs4support-5.73.0/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/3mizvrlgpp4wl6w0k7fzjnnsd1lbc71r-kemoticons-5.73.0-bin/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/w266zrgfs7pqxchsrnliqx7mnl6ipa99-kplotting-5.73.0/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/k4da5h6zism43ffnlmb9q2r5fgyn38sv-baloo-5.73.0-bin/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/jy0c3dk2f73sybg4bzsz8w0jffrsafx3-kidletime-5.73.0-bin/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/g4ymybdrnp0zzl0yfij4f9798srl16wz-kfilemetadata-5.73.0-bin/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/5bkkcxl6mcgvmn99zsikalvrb8sc3gdp-qtmultimedia-5.12.7-bin/lib/qt-5.12.7/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() checking directory path "/nix/store/0xv6fhh8r1d904vfvi3yx8jrza176adb-kmail-20.08.1/bin/platforms" ...
Cannot load library /nix/store/kfbb1vmmjfkwrgmfv04d3x5b179lz47h-qtbase-5.12.7-bin/lib/qt-5.12.7/plugins/platforms/libqxcb.so: (/nix/store/kfbb1vmmjfkwrgmfv04d3x5b179lz47h-qtbase-5.12.7-bin/lib/qt-5.12.7/plugins/platforms/../../../../../1s343458k8v2nkid1fgy4185iv1c9vdv-qtbase-5.12.7/lib/libQt5XcbQpa.so.5: undefined symbol: _ZN22QWindowSystemInterface16handleMouseEventINS_15DefaultDeliveryEEEvP7QWindowmRK7QPointFS6_6QFlagsIN2Qt11MouseButtonEES9_N6QEvent4TypeES7_INS8_16KeyboardModifierEENS8_16MouseEventSourceE, version Qt_5_PRIVATE_API)
QLibraryPrivate::loadPlugin failed on "/nix/store/kfbb1vmmjfkwrgmfv04d3x5b179lz47h-qtbase-5.12.7-bin/lib/qt-5.12.7/plugins/platforms/libqxcb.so" : "Cannot load library /nix/store/kfbb1vmmjfkwrgmfv04d3x5b179lz47h-qtbase-5.12.7-bin/lib/qt-5.12.7/plugins/platforms/libqxcb.so: (/nix/store/kfbb1vmmjfkwrgmfv04d3x5b179lz47h-qtbase-5.12.7-bin/lib/qt-5.12.7/plugins/platforms/../../../../../1s343458k8v2nkid1fgy4185iv1c9vdv-qtbase-5.12.7/lib/libQt5XcbQpa.so.5: undefined symbol: _ZN22QWindowSystemInterface16handleMouseEventINS_15DefaultDeliveryEEEvP7QWindowmRK7QPointFS6_6QFlagsIN2Qt11MouseButtonEES9_N6QEvent4TypeES7_INS8_16KeyboardModifierEENS8_16MouseEventSourceE, version Qt_5_PRIVATE_API)"
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, xcb, wayland-org.kde.kwin.qpa.

[1]    22758 abort (core dumped)  kmail