On IntelliJ IDEA 2023.3 the plugin works OK, but quite often throws an exception with the following stacktrace:
java.lang.Throwable: Access is allowed from Event Dispatch Thread (EDT) only
at com.intellij.openapi.vcs.changes.ui.ChangesTree.getInclusionModel(ChangesTree.java:549)
at com.intellij.openapi.vcs.changes.ui.ChangesTree.getIncludedSet(ChangesTree.java:617)
at com.intellij.openapi.vcs.changes.ui.VcsTreeModelData$IncludedUnderData.<init>(VcsTreeModelData.java:255)
at com.intellij.openapi.vcs.changes.ui.VcsTreeModelData.included(VcsTreeModelData.java:54)
at com.intellij.openapi.vcs.changes.ui.MultipleLocalChangeListsBrowser.getIncludedChanges(MultipleLocalChangeListsBrowser.java:330)
at com.intellij.openapi.vcs.changes.ui.CommitChangeListDialog.getIncludedChanges(CommitChangeListDialog.java:749)
at com.intellij.vcs.commit.AbstractCommitWorkflowHandlerKt.getIncludedPaths(AbstractCommitWorkflowHandler.kt:42)
at com.intellij.vcs.commit.CommitProjectPanelAdapter.getVirtualFiles(CommitProjectPanelAdapter.kt:29)
at org.infernus.idea.checkstyle.handlers.ScanFilesBeforeCheckinHandler$2.run(ScanFilesBeforeCheckinHandler.java:88)
at com.intellij.openapi.progress.impl.CoreProgressManager.startTask(CoreProgressManager.java:434)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.startTask(ProgressManagerImpl.java:132)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcessWithProgressSynchronously$8(CoreProgressManager.java:518)
at com.intellij.openapi.progress.impl.ProgressRunner.lambda$new$0(ProgressRunner.java:84)
at com.intellij.openapi.progress.impl.ProgressRunner.lambda$submit$4(ProgressRunner.java:248)
at com.intellij.openapi.progress.ProgressManager.lambda$runProcess$0(ProgressManager.java:73)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$1(CoreProgressManager.java:192)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$executeProcessUnderProgress$12(CoreProgressManager.java:610)
at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:685)
at com.intellij.openapi.progress.impl.CoreProgressManager.computeUnderProgress(CoreProgressManager.java:641)
at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:609)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:78)
at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:179)
at com.intellij.openapi.progress.ProgressManager.runProcess(ProgressManager.java:73)
at com.intellij.openapi.progress.impl.ProgressRunner.lambda$submit$5(ProgressRunner.java:248)
at com.intellij.openapi.progress.impl.ProgressRunner$ProgressRunnable.run(ProgressRunner.java:498)
at com.intellij.util.concurrency.ChildContext$runAsCoroutine$1.invoke(propagation.kt:81)
at com.intellij.util.concurrency.ChildContext$runAsCoroutine$1.invoke(propagation.kt:81)
at com.intellij.util.concurrency.ChildContext.runAsCoroutine(propagation.kt:86)
at com.intellij.util.concurrency.ChildContext.runAsCoroutine(propagation.kt:81)
at com.intellij.openapi.progress.impl.ProgressRunner.lambda$launchTask$18(ProgressRunner.java:464)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:702)
at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:699)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1.run(Executors.java:699)
at java.base/java.lang.Thread.run(Thread.java:840)
On IntelliJ IDEA 2023.3 the plugin works OK, but quite often throws an exception with the following stacktrace: