Installing plugin broke PyCharm

[MikhailPasechnik]

1. Folders containing .qml files not accesable
2. File -> Settings dialog not opening
3. Only way to repair PyCharm is to click Disable plugin... in stack trace dialog.

Stack Trace:

com.intellij.ide.plugins.MainRunner$StartupAbortedException: Fatal error initializing 'com.intellij.psi.impl.cache.impl.todo.TodoIndex'
    at com.intellij.ide.plugins.PluginManager.handleComponentError(PluginManager.java:125)
    at com.intellij.util.indexing.FileBasedIndexImpl$FileIndexDataInitialization.lambda$initAssociatedDataForExtensions$0(FileBasedIndexImpl.java:2400)
    at com.intellij.util.indexing.IndexInfrastructure$DataInitialization.executeNestedInitializationTask(IndexInfrastructure.java:217)
    at com.intellij.util.indexing.IndexInfrastructure$DataInitialization.runParallelNestedInitializationTasks(IndexInfrastructure.java:205)
    at com.intellij.util.indexing.IndexInfrastructure$DataInitialization.call(IndexInfrastructure.java:166)
    at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
    at com.intellij.util.concurrency.BoundedTaskExecutor.doRun(BoundedTaskExecutor.java:207)
    at com.intellij.util.concurrency.BoundedTaskExecutor.access$100(BoundedTaskExecutor.java:29)
    at com.intellij.util.concurrency.BoundedTaskExecutor$1.lambda$run$0(BoundedTaskExecutor.java:185)
    at com.intellij.util.ConcurrencyUtil.runUnderThreadName(ConcurrencyUtil.java:208)
    at com.intellij.util.concurrency.BoundedTaskExecutor$1.run(BoundedTaskExecutor.java:181)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
    at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.lang.ExceptionInInitializerError
    at quickturnstudio.sdk.language.qml.QmlFileType.<init>(QmlFileType.java)
    at quickturnstudio.sdk.language.qml.QmlFileType.<clinit>(QmlFileType.java)
    at java.base/java.lang.Class.forName0(Native Method)
    at java.base/java.lang.Class.forName(Class.java:398)
    at com.intellij.openapi.extensions.AbstractExtensionPointBean.findClass(AbstractExtensionPointBean.java:41)
    at com.intellij.openapi.extensions.AbstractExtensionPointBean.findClass(AbstractExtensionPointBean.java:34)
    at com.intellij.openapi.fileTypes.impl.FileTypeManagerImpl.instantiateFileTypeBean(FileTypeManagerImpl.java:428)
    at com.intellij.openapi.fileTypes.impl.FileTypeManagerImpl.instantiatePendingFileTypes(FileTypeManagerImpl.java:419)
    at com.intellij.openapi.fileTypes.impl.FileTypeManagerImpl.getRegisteredFileTypes(FileTypeManagerImpl.java:1176)
    at com.intellij.psi.impl.cache.impl.todo.TodoIndex.getVersion(TodoIndex.java:109)
    at com.intellij.util.indexing.FileBasedIndexImpl.registerIndexer(FileBasedIndexImpl.java:337)
    at com.intellij.util.indexing.FileBasedIndexImpl.access$5500(FileBasedIndexImpl.java:99)
    at com.intellij.util.indexing.FileBasedIndexImpl$FileIndexDataInitialization.lambda$initAssociatedDataForExtensions$0(FileBasedIndexImpl.java:2394)
    ... 12 more
Caused by: com.intellij.diagnostic.ImplementationConflictException: Language with ID 'QML' is already registered: class name.kropp.intellij.qml.QmlLanguage
    at com.intellij.lang.Language.<init>(Language.java:82)
    at com.intellij.lang.Language.<init>(Language.java:58)
    at com.intellij.lang.Language.<init>(Language.java:54)
    at quickturnstudio.sdk.language.qml.IIIIIIIIIIIiIIIiIIIIIiIiiIiiiIiIIiIIiiiiiiIiiIIiIIIIiI.<init>(QmlLanguage.java)
    at quickturnstudio.sdk.language.qml.IIIIIIIIIIIiIIIiIIIIIiIiiIiiiIiIIiIIiiiiiiIiiIIiIIIIiI.<clinit>(QmlLanguage.java)
    ... 25 more

[MikhailPasechnik]

I suspect that it is caused by another plugin thats declares class name.kropp.intellij.qml.QmlLanguage https://plugins.jetbrains.com/plugin/9532-qml-support

[grabusr]

Hello Mikhail,

This can happen when you have installed and activated both plugins: QML Editor and QML support. Did you disable QML support plugin?

We put the comment about this in the description of the plugin and from 2019.3 platform IDE should inform about that during starting IDE. Unfortunately JetBrains platform does not handle that case and we are able only to inform about conflict and give possibility to disable plugin after restarting the IDE after installation our plugin.

[MikhailPasechnik]

Hello Mikhail,

This can happen when you have installed and activated both plugins: QML Editor and QML support. Did you disable QML support plugin?

Hello grabusr! Yes, disabling qml-support plugin solved this!

[grabusr]

Great! Thank you for reporting the issue! Let us know if you discover another problem or request a feature.