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.