Details
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Bug
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Resolution: Unresolved
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P2: Important
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6.6.0
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None
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Void Linux, Qt 6.6.0
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Linux/X11,
Description
When building a QML application with QML debugging enabled and running it in qmlpreview, the Qt plugin loader fails to load libworkerscriptplugin.so with the error "failed to map to memory: Unknown error". This prevents the QML module QtQml from being loaded and the application from launching. This does not happen when the application is run directly.
Through some debugging, it would appear that d->fileEngine->supportsExtension(QAbstractFileEngine::MapExtension) returns false, when it seems like it should be returning true.
The attached minimal reproducing application causes the error when run in qmlpreview:
$ mkdir build; cd build $ cmake ..; make $ qmlpreview ./helloworld QML debugging is enabled. Only use this in a safe environment. QML Debugger: Connecting to socket /tmp/qmlpreview.sMiiGA... qt.core.plugin.loader: /usr/lib/qt6/qml/QtQml/WorkerScript/libworkerscriptplugin.so: failed to map to memory: Unknown error qt.core.plugin.loader: /usr/lib/qt6/qml/QtQml/WorkerScript/libworkerscriptplugin.so: failed to map to memory: Unknown error qt.core.plugin.loader: /usr/lib/qt6/qml/QtQml/WorkerScript/libworkerscriptplugin.so: failed to map to memory: Unknown error qt.core.plugin.loader: /usr/lib/qt6/qml/QtQml/WorkerScript/libworkerscriptplugin.so: failed to map to memory: Unknown error QQmlApplicationEngine failed to load component qrc:/main.qml:8:1: module "QtQuick" version 2.12 cannot be imported because: module "QtQml" version 2.12 cannot be imported because: The file '/usr/lib/qt6/qml/QtQml/WorkerScript/libworkerscriptplugin.so' is not a valid Qt plugin. qrc:/main.qml: module "QtQml" version 2.12 cannot be imported because: The file '/usr/lib/qt6/qml/QtQml/WorkerScript/libworkerscriptplugin.so' is not a valid Qt plugin. qrc:/main.qml: The file '/usr/lib/qt6/qml/QtQml/WorkerScript/libworkerscriptplugin.so' is not a valid Qt plugin. qrc:/main.qml: module "QtQml" version 2.12 cannot be imported because: The file '/usr/lib/qt6/qml/QtQml/WorkerScript/libworkerscriptplugin.so' is not a valid Qt plugin. qrc:/main.qml: The file '/usr/lib/qt6/qml/QtQml/WorkerScript/libworkerscriptplugin.so' is not a valid Qt plugin. qrc:/main.qml: module "QtQuick" version 2.12 cannot be imported because: module "QtQml" version 2.12 cannot be imported because: The file '/usr/lib/qt6/qml/QtQml/WorkerScript/libworkerscriptplugin.so' is not a valid Qt plugin. qrc:/main.qml: module "QtQml" version 2.12 cannot be imported because: The file '/usr/lib/qt6/qml/QtQml/WorkerScript/libworkerscriptplugin.so' is not a valid Qt plugin. qrc:/main.qml: The file '/usr/lib/qt6/qml/QtQml/WorkerScript/libworkerscriptplugin.so' is not a valid Qt plugin. qrc:/main.qml: module "QtQml" version 2.12 cannot be imported because: The file '/usr/lib/qt6/qml/QtQml/WorkerScript/libworkerscriptplugin.so' is not a valid Qt plugin. qrc:/main.qml: The file '/usr/lib/qt6/qml/QtQml/WorkerScript/libworkerscriptplugin.so' is not a valid Qt plugin. qrc:/main.qml: Failed to load dependent import "QtQml.WorkerScript" version 2.12 qrc:/main.qml: Failed to load dependencies for module "QtQml" version 2.12 qrc:/main.qml: Failed to load dependent import "QtQml.WorkerScript" version 2.12 qrc:/main.qml: Failed to load dependencies for module "QtQml" version 2.12 qrc:/main.qml: Failed to load dependent import "QtQml" version 2.12 qrc:/main.qml: Failed to load dependencies for module "QtQuick" version 2.12 qrc:/main.qml: Failed to load dependent import "QtQml.WorkerScript" version 2.12 qrc:/main.qml: Failed to load dependencies for module "QtQml" version 2.12 qrc:/main.qml: Failed to load dependent import "QtQml.WorkerScript" version 2.12 qrc:/main.qml: Failed to load dependencies for module "QtQml" version 2.12 qrc:/main.qml: Failed to load dependent import "QtQml" version 2.12 qrc:/main.qml: Failed to load dependencies for module "QtQuick" version 2.12
If a Void Linux environment is needed, OCI containers are available:
$ docker run -it -v $(pwd)/testapp:/test ghcr.io/void-linux/void-glibc-full # xbps-install -Syu base-devel cmake qt6-declarative-devel qt6-declarative-tools # mkdir /test/build; cd /test/build # cmake ..; make # QT_QPA_PLATFORM=offscreen /usr/lib/qt6/bin/qmlpreview ./helloworld