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Issue created by Ryan Palmer@RyanGPalmer

ClassNotFoundException from IntelliJ plugin makes IDE unusable until plugin disabled

Installing the "Buck for IDEA" plugin on IntelliJ 2021.3.1 (and a few less recent versions) renders the IDE completely unusable due to an error on startup:

Plugin 'intellij.buck.plugin' failed to initialize and will be disabled. Please restart IntelliJ IDEA.

java.lang.ClassNotFoundException: com.facebook.buck.intellij.ideabuck.config.BuckModule
       PluginClassLoader(plugin=PluginDescriptor(name=Buck for IDEA, id=intellij.buck.plugin, descriptorPath=plugin.xml, path=~/Library/Application Support/JetBrains/IntelliJIdea2021.3/plugins/ideabuck-3.5.2.jar, version=3.5.2, package=null, isBundled=false), packagePrefix=null, instanceId=327, state=active)
    at com.intellij.ide.plugins.cl.PluginClassLoader.loadClass(PluginClassLoader.java:235)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
    at com.intellij.serviceContainer.ComponentManagerImpl.registerComponent(ComponentManagerImpl.kt:437)
    at com.intellij.serviceContainer.ComponentManagerImpl.registerComponents(ComponentManagerImpl.kt:372)
    at com.intellij.serviceContainer.ComponentManagerImpl.access$registerComponents(ComponentManagerImpl.kt:56)
    at com.intellij.serviceContainer.ComponentManagerImpl.registerComponents(ComponentManagerImpl.kt:253)
    at com.intellij.openapi.client.ClientAwareComponentManager.registerComponents(ClientAwareComponentManager.kt:63)
    at com.intellij.serviceContainer.ComponentManagerImpl.registerComponents(ComponentManagerImpl.kt:227)
    at com.intellij.openapi.project.impl.ProjectLoadHelper.registerComponents(projectLoader.kt:25)
    at com.intellij.openapi.project.impl.ProjectManagerImpl.initProject(ProjectManagerImpl.java:177)
    at com.intellij.openapi.project.impl.ProjectManagerExImpl.prepareProject(ProjectManagerExImpl.kt:342)
    at com.intellij.openapi.project.impl.ProjectManagerExImpl.access$prepareProject(ProjectManagerExImpl.kt:58)
    at com.intellij.openapi.project.impl.ProjectManagerExImpl$doOpenAsync$1.invoke(ProjectManagerExImpl.kt:125)
    at com.intellij.openapi.project.impl.ProjectManagerExImpl$doOpenAsync$1.invoke(ProjectManagerExImpl.kt:58)
    at com.intellij.openapi.project.impl.ProjectUiFrameAllocator$run$progressRunner$1.apply(ProjectFrameAllocator.kt:94)
    at com.intellij.openapi.project.impl.ProjectUiFrameAllocator$run$progressRunner$1.apply(ProjectFrameAllocator.kt:71)
    at com.intellij.openapi.progress.impl.ProgressRunner.lambda$submit$3(ProgressRunner.java:244)
    at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$2(CoreProgressManager.java:188)
    at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$executeProcessUnderProgress$12(CoreProgressManager.java:624)
    at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:698)
    at com.intellij.openapi.progress.impl.CoreProgressManager.computeUnderProgress(CoreProgressManager.java:646)
    at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:623)
    at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:66)
    at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:175)
    at com.intellij.openapi.progress.impl.ProgressRunner.lambda$submit$4(ProgressRunner.java:244)
    at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1700)
    at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.exec(CompletableFuture.java:1692)
    at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
    at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1020)
    at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1656)
    at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1594)
    at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183)

Disabling the plugin is the only way to resolve the issue.