PyCharm Plugin: IllegalStateException in Cascadebar.getContent() must not return null

[MorisFinkel-vergleich]

Bug Description

java.lang.IllegalStateException: @NotNull method com/intellij/ui/popup/AbstractPopup.getContent must not return null occurs in Codeium plugin for PyCharm when trying to hide windows during window deactivation.

Environment

• IDE: PyCharm 2025.3
• OS: Linux (Ubuntu-based)
• Codeium Plugin Version: (latest)

Stack Trace

java.lang.IllegalStateException: @NotNull method com/intellij/ui/popup/AbstractPopup.getContent must not return null
	at com.intellij.ui.popup.AbstractPopup.$$$reportNull$$$0(AbstractPopup.java)
	at com.intellij.ui.popup.AbstractPopup.getContent(AbstractPopup.java:1914)
	at com.codeium.intellij.diff.ui.Cascadebar.hideWindows(Cascadebar.kt:128)
	at com.codeium.intellij.diff.services.CascadebarService$setupWindowActivationListener$1$listener$1.windowDeactivated(CascadebarService.kt:107)
	at java.desktop/java.awt.AWTEventMulticaster.windowDeactivated(AWTEventMulticaster.java:410)
	at java.desktop/java.awt.AWTEventMulticaster.windowDeactivated(AWTEventMulticaster.java:409)
	at java.desktop/java.awt.Window.processWindowEvent(Window.java:2143)
	at java.desktop/javax.swing.JFrame.processWindowEvent(JFrame.java:298)
	at java.desktop/java.awt.Window.processEvent(Window.java:2087)
	at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:5049)
	at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2324)
	at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2823)
	at java.desktop/java.awt.Component.dispatchEvent(Component.java:4877)
	at java.desktop/java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1954)
	at java.desktop/java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:1073)
	at java.desktop/java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:763)
	at com.intellij.ide.IdeKeyboardFocusManager.dispatchEvent$lambda$0(IdeKeyboardFocusManager.kt:49)
	at com.intellij.ide.IdeKeyboardFocusManager.dispatchEvent$lambda$1(IdeKeyboardFocusManager.kt:55)
	at com.intellij.ide.IdeEventQueueKt.performActivity$lambda$1(IdeEventQueue.kt:1065)
	at com.intellij.openapi.application.TransactionGuardImpl.performActivity(TransactionGuardImpl.java:109)
	at com.intellij.ide.IdeEventQueueKt.performActivity(IdeEventQueue.kt:1065)
	at com.intellij.ide.IdeKeyboardFocusManager.dispatchEvent(IdeKeyboardFocusManager.kt:55)
	at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:4926)
	at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2324)
	at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2823)
	at java.desktop/java.awt.Component.dispatchEvent(Component.java:4877)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:783)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:728)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:722)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:400)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:87)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:98)
	at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:755)
	at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:753)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:400)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:87)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:752)
	at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.kt:664)
	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.kt:517)
	at com.intellij.ide.IdeEventQueue.dispatchEvent$lambda$0$0$0$0(IdeEventQueue.kt:337)
	at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:901)
	at com.intellij.ide.IdeEventQueue.dispatchEvent$lambda$0$0$0(IdeEventQueue.kt:336)
	at com.intellij.ide.IdeEventQueueKt.performActivity$lambda$1(IdeEventQueue.kt:1065)
	at com.intellij.openapi.application.TransactionGuardImpl.performActivity(TransactionGuardImpl.java:109)
	at com.intellij.ide.IdeEventQueueKt.performActivity(IdeEventQueue.kt:1065)
	at com.intellij.ide.IdeEventQueue.dispatchEvent$lambda$0(IdeEventQueue.kt:331)
	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.kt:371)
	at java.desktop/java.awt.SentEvent.dispatch(SentEvent.java:75)
	at java.desktop/java.awt.DefaultKeyboardFocusManager$DefaultKeyboardFocusManagerSentEvent.dispatch(DefaultKeyboardFocusManager.java:262)
	at java.desktop/java.awt.DefaultKeyboardFocusManager.sendMessage(DefaultKeyboardFocusManager.java:289)
	at java.desktop/java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:544)
	at com.intellij.ide.IdeKeyboardFocusManager.dispatchEvent$lambda$0(IdeKeyboardFocusManager.kt:49)
	at com.intellij.ide.IdeKeyboardFocusManager.dispatchEvent$lambda$1(IdeKeyboardFocusManager.kt:55)
	at com.intellij.ide.IdeEventQueueKt.performActivity$lambda$1(IdeEventQueue.kt:1065)
	at com.intellij.openapi.application.TransactionGuardImpl.performActivity(TransactionGuardImpl.java:109)
	at com.intellij.ide.IdeEventQueueKt.performActivity(IdeEventQueue.kt:1065)
	at com.intellij.ide.IdeKeyboardFocusManager.dispatchEvent(IdeKeyboardFocusManager.kt:55)
	at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:4926)
	at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2324)
	at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2823)
	at java.desktop/java.awt.Component.dispatchEvent(Component.java:4877)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:783)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:728)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:722)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:400)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:87)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:98)
	at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:755)
	at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:753)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:400)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:87)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:752)
	at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.kt:664)
	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.kt:517)
	at com.intellij.ide.IdeEventQueue.dispatchEvent$lambda$0$0$0$0(IdeEventQueue.kt:337)
	at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:901)
	at com.intellij.ide.IdeEventQueue.dispatchEvent$lambda$0$0$0(IdeEventQueue.kt:336)
	at com.intellij.ide.IdeEventQueueKt.performActivity$lambda$1(IdeEventQueue.kt:1065)
	at com.intellij.openapi.application.TransactionGuardImpl.performActivity(TransactionGuardImpl.java:117)
	at com.intellij.ide.IdeEventQueueKt.performActivity(IdeEventQueue.kt:1065)
	at com.intellij.ide.IdeEventQueue.dispatchEvent$lambda$0(IdeEventQueue.kt:331)
	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.kt:371)
	at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:207)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:121)
	at java.desktop/java.awt.WaitDispatchSupport$2.run(WaitDispatchSupport.java:191)
	at java.desktop/java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:236)
	at java.desktop/java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:234)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:319)
	at java.desktop/java.awt.WaitDispatchSupport.enter(WaitDispatchSupport.java:234)
	at java.desktop/java.awt.Dialog.show(Dialog.java:1079)
	at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl$MyDialog.show(DialogWrapperPeerImpl.java:935)
	at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl.lambda$show$13(DialogWrapperPeerImpl.java:506)
	at com.intellij.openapi.application.WriteIntentReadAction.lambda$run$0(WriteIntentReadAction.java:24)
	at com.intellij.openapi.application.impl.AppImplKt$rethrowCheckedExceptions$2.invoke(appImpl.kt:126)
	at com.intellij.platform.locking.impl.NestedLocksThreadingSupport.doRunWriteIntentReadAction(NestedLocksThreadingSupport.kt:736)
	at com.intellij.platform.locking.impl.NestedLocksThreadingSupport.runPreventiveWriteIntentReadAction(NestedLocksThreadingSupport.kt:710)
	at com.intellij.platform.locking.impl.NestedLocksThreadingSupport.runWriteIntentReadAction(NestedLocksThreadingSupport.kt:664)
	at com.intellij.openapi.application.impl.ApplicationImpl.runWriteIntentReadAction(ApplicationImpl.java:1185)
	at com.intellij.openapi.application.WriteIntentReadAction.compute(WriteIntentReadAction.java:55)
	at com.intellij.openapi.application.WriteIntentReadAction.run(WriteIntentReadAction.java:23)
	at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl.lambda$show$14(DialogWrapperPeerImpl.java:505)
	at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl.lambda$show$5(DialogWrapperPeerImpl.java:450)
	at com.intellij.concurrency.ThreadContext.installThreadContext(threadContext.kt:305)
	at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl.lambda$show$6(DialogWrapperPeerImpl.java:449)
	at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl.show(DialogWrapperPeerImpl.java:501)
	at com.intellij.openapi.ui.DialogWrapper.lambda$doShow$16(DialogWrapper.java:1823)
	at com.intellij.openapi.application.WriteIntentReadAction.lambda$run$0(WriteIntentReadAction.java:24)
	at com.intellij.openapi.application.impl.AppImplKt$rethrowCheckedExceptions$2.invoke(appImpl.kt:126)
	at com.intellij.platform.locking.impl.NestedLocksThreadingSupport.doRunWriteIntentReadAction(NestedLocksThreadingSupport.kt:736)
	at com.intellij.platform.locking.impl.NestedLocksThreadingSupport.runPreventiveWriteIntentReadAction(NestedLocksThreadingSupport.kt:710)
	at com.intellij.platform.locking.impl.NestedLocksThreadingSupport.runWriteIntentReadAction(NestedLocksThreadingSupport.kt:664)
	at com.intellij.openapi.application.impl.ApplicationImpl.runWriteIntentReadAction(ApplicationImpl.java:1185)
	at com.intellij.openapi.application.WriteIntentReadAction.compute(WriteIntentReadAction.java:55)
	at com.intellij.openapi.application.WriteIntentReadAction.run(WriteIntentReadAction.java:23)
	at com.intellij.openapi.ui.DialogWrapper.doShow(DialogWrapper.java:1822)
	at com.intellij.openapi.ui.DialogWrapper.show(DialogWrapper.java:1770)
	at com.intellij.refactoring.ui.RefactoringDialog.show(RefactoringDialog.java:102)
	at com.intellij.refactoring.rename.PsiElementRenameHandler.rename(PsiElementRenameHandler.java:224)
	at com.intellij.refactoring.rename.PsiElementRenameHandler.invoke(PsiElementRenameHandler.java:128)
	at com.intellij.refactoring.rename.PsiElementRenameHandler.invoke(PsiElementRenameHandler.java:101)
	at com.intellij.refactoring.rename.PsiElementRenameHandler.invoke(PsiElementRenameHandler.java:84)
	at com.intellij.refactoring.actions.BaseRefactoringAction.performRefactoringAction(BaseRefactoringAction.java:163)
	at com.intellij.refactoring.rename.RenameHandler2Renamer.performRename(RenameHandler2Renamer.java:38)
	at com.intellij.refactoring.actions.RenameElementAction.lambda$actionPerformed$2(RenameElementAction.java:91)
	at com.intellij.openapi.application.WriteIntentReadAction.lambda$run$0(WriteIntentReadAction.java:24)
	at com.intellij.openapi.application.impl.AppImplKt$rethrowCheckedExceptions$2.invoke(appImpl.kt:126)
	at com.intellij.platform.locking.impl.NestedLocksThreadingSupport.doRunWriteIntentReadAction(NestedLocksThreadingSupport.kt:736)
	at com.intellij.platform.locking.impl.NestedLocksThreadingSupport.runPreventiveWriteIntentReadAction(NestedLocksThreadingSupport.kt:710)
	at com.intellij.platform.locking.impl.NestedLocksThreadingSupport.runWriteIntentReadAction(NestedLocksThreadingSupport.kt:664)
	at com.intellij.openapi.application.impl.ApplicationImpl.runWriteIntentReadAction(ApplicationImpl.java:1185)
	at com.intellij.openapi.application.WriteIntentReadAction.compute(WriteIntentReadAction.java:55)
	at com.intellij.openapi.application.WriteIntentReadAction.run(WriteIntentReadAction.java:23)
	at com.intellij.refactoring.actions.RenameElementAction.actionPerformed(RenameElementAction.java:60)
	at com.intellij.openapi.actionSystem.ex.ActionUtil.doPerformActionOrShowPopup(ActionUtil.kt:437)
	at com.intellij.openapi.keymap.impl.ActionProcessor.performAction(ActionProcessor.kt:26)
	at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher$actionProcessor$1.performAction(IdeKeyEventDispatcher.kt:499)
	at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcherKt.doPerformActionInner$lambda$0$0(IdeKeyEventDispatcher.kt:824)
	at com.intellij.openapi.application.TransactionGuardImpl.performActivity(TransactionGuardImpl.java:109)
	at com.intellij.openapi.application.TransactionGuardImpl.performUserActivity(TransactionGuardImpl.java:98)
	at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcherKt.doPerformActionInner$lambda$0(IdeKeyEventDispatcher.kt:823)
	at com.intellij.openapi.actionSystem.impl.ActionManagerImpl.performWithActionCallbacks$lambda$0(ActionManagerImpl.kt:1164)
	at com.intellij.concurrency.ThreadContext.installThreadContext(threadContext.kt:305)
	at com.intellij.openapi.actionSystem.impl.ActionManagerImpl.performWithActionCallbacks(ActionManagerImpl.kt:1162)
	at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcherKt.doPerformActionInner(IdeKeyEventDispatcher.kt:821)
	at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcherKt.access$doPerformActionInner(IdeKeyEventDispatcher.kt:1)
	at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.processAction(IdeKeyEventDispatcher.kt:554)
	at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.processAction(IdeKeyEventDispatcher.kt:512)
	at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.processActionOrWaitSecondStroke(IdeKeyEventDispatcher.kt:451)
	at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.inInitState(IdeKeyEventDispatcher.kt:444)
	at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.dispatchKeyEvent(IdeKeyEventDispatcher.kt:306)
	at com.intellij.ide.IdeEventQueue.dispatchKeyEvent(IdeEventQueue.kt:555)
	at com.intellij.ide.IdeEventQueue._dispatchEvent$lambda$3(IdeEventQueue.kt:509)
	at com.intellij.platform.locking.impl.NestedLocksThreadingSupport.doRunWriteIntentReadAction(NestedLocksThreadingSupport.kt:736)
	at com.intellij.platform.locking.impl.NestedLocksThreadingSupport.runPreventiveWriteIntentReadAction(NestedLocksThreadingSupport.kt:710)
	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.kt:509)
	at com.intellij.ide.IdeEventQueue.dispatchEvent$lambda$0$0$0$0(IdeEventQueue.kt:337)
	at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:901)
	at com.intellij.ide.IdeEventQueue.dispatchEvent$lambda$0$0$0(IdeEventQueue.kt:336)
	at com.intellij.ide.IdeEventQueueKt.performActivity$lambda$1(IdeEventQueue.kt:1065)
	at com.intellij.openapi.application.TransactionGuardImpl.performActivity(TransactionGuardImpl.java:117)
	at com.intellij.ide.IdeEventQueueKt.performActivity(IdeEventQueue.kt:1065)
	at com.intellij.ide.IdeEventQueue.dispatchEvent$lambda$0(IdeEventQueue.kt:331)
	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.kt:371)
	at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:207)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
	at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:92)

Steps to Reproduce

1. Open PyCharm with Codeium plugin enabled
2. Trigger rename operation (Shift+F6) on any element
3. The error occurs during window deactivation when trying to hide Codeium UI elements

Root Cause Analysis

The issue appears to be in Cascadebar.kt:128 where hideWindows() method calls getContent() on an AbstractPopup that returns null, violating the @NotNull contract.

Expected Behavior

The plugin should handle null content gracefully or ensure content is properly initialized before accessing it.

Actual Behavior

IllegalStateException is thrown, disrupting the IDE operation.

Workaround

1. Restart PyCharm IDE
2. Disable/re-enable Codeium plugin
3. Update to latest plugin version (if available)

Severity

Medium - doesn't crash IDE completely but interrupts workflow

Additional Context

This appears to be a race condition or lifecycle issue where the popup content is disposed/destroyed before the hideWindows() method attempts to access it.