AWT events are prohibited inside update

[rhoglund]

On IntelliJ 2021.1.1 I often get this error (and an IDE error popup):

java.lang.Throwable: AWT events are prohibited inside update; got java.awt.event.InvocationEvent[INVOCATION_DEFAULT,runnable=com.intellij.openapi.application.impl.FlushQueue$FlushNow@35277d70,notifier=null,catchExceptions=false,when=1620803541909] on sun.lwawt.macosx.LWCToolkit@7db67ad4 at com.intellij.openapi.diagnostic.Logger.error(Logger.java:161) at com.intellij.ide.ProhibitAWTEvents.dispatch(ProhibitAWTEvents.java:34) at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$9(IdeEventQueue.java:469) at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:781) at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:496) at com.intellij.ide.IdeEventQueue.pumpEventsForHierarchy(IdeEventQueue.java:1019) at com.intellij.openapi.progress.util.ProgressWindow.lambda$startBlocking$7(ProgressWindow.java:225) at com.intellij.openapi.application.impl.ApplicationImpl.runUnlockingIntendedWrite(ApplicationImpl.java:807) at com.intellij.openapi.progress.util.ProgressWindow.startBlocking(ProgressWindow.java:221) at com.intellij.openapi.progress.impl.ProgressRunner.lambda$execFromEDT$6(ProgressRunner.java:296) at java.base/java.util.concurrent.CompletableFuture.uniAcceptNow(CompletableFuture.java:753) at java.base/java.util.concurrent.CompletableFuture.uniAcceptStage(CompletableFuture.java:731) at java.base/java.util.concurrent.CompletableFuture.thenAccept(CompletableFuture.java:2108) at com.intellij.openapi.progress.impl.ProgressRunner.execFromEDT(ProgressRunner.java:293) at com.intellij.openapi.progress.impl.ProgressRunner.submit(ProgressRunner.java:243) at com.intellij.openapi.progress.impl.ProgressRunner.submitAndGet(ProgressRunner.java:172) at com.intellij.openapi.application.impl.ApplicationImpl.runProcessWithProgressSynchronously(ApplicationImpl.java:402) at com.intellij.openapi.progress.impl.CoreProgressManager.runProcessWithProgressSynchronously(CoreProgressManager.java:557) at com.intellij.openapi.progress.impl.ProgressManagerImpl.runProcessWithProgressSynchronously(ProgressManagerImpl.java:89) at com.intellij.openapi.progress.impl.CoreProgressManager.runProcessWithProgressSynchronously(CoreProgressManager.java:271) at org.para.plugin.OpenInSplittedTabBaseAction.underModalProgress(OpenInSplittedTabBaseAction.java:287) at org.para.plugin.OpenInSplittedTabBaseAction.getTargets(OpenInSplittedTabBaseAction.java:280) at org.para.plugin.OpenInSplittedTabBaseAction.update(OpenInSplittedTabBaseAction.java:244) at com.intellij.openapi.actionSystem.AnAction.beforeActionPerformedUpdate(AnAction.java:295) at com.intellij.openapi.actionSystem.ex.ActionUtil.lambda$performDumbAwareUpdate$0(ActionUtil.java:169) at com.intellij.util.SlowOperations.lambda$allowSlowOperations$0(SlowOperations.java:77) at com.intellij.util.SlowOperations.allowSlowOperations(SlowOperations.java:64) at com.intellij.util.SlowOperations.allowSlowOperations(SlowOperations.java:76) at com.intellij.openapi.actionSystem.ex.ActionUtil.performDumbAwareUpdate(ActionUtil.java:176) at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.processAction(IdeKeyEventDispatcher.java:648) at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.processAction(IdeKeyEventDispatcher.java:626) at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.processActionOrWaitSecondStroke(IdeKeyEventDispatcher.java:486) at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.inInitState(IdeKeyEventDispatcher.java:481) at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.dispatchKeyEvent(IdeKeyEventDispatcher.java:232) at com.intellij.ide.IdeEventQueue.dispatchKeyEvent(IdeEventQueue.java:889) at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:833) at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$8(IdeEventQueue.java:449) at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:808) at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$9(IdeEventQueue.java:448) at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:781) at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:502) at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203) at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124) at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113) at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109) at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101) at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)

[klieret]

Also see this in Pycharm Professional 2021.1.1 on Ubuntu 19.10. Luckily the plugin still works despite this error message.