[bug] exception when invoking subclasses popup

[pq]

Invoking the subclasses popup

provokes an assertion failure:

java.lang.Throwable: Assertion failed: Do not use PsiElement for popup model. See PsiTargetNavigator
	at com.intellij.openapi.diagnostic.Logger.assertTrue(Logger.java:472)
	at com.intellij.ui.popup.PopupFactoryImpl.createPopupChooserBuilder(PopupFactoryImpl.java:84)
	at com.jetbrains.rdserver.ui.popup.BackendBePopupFactory.createPopupChooserBuilder(BackendBePopupFactory.kt:186)
	at com.intellij.codeInsight.daemon.impl.PsiElementListNavigator$NavigateOrPopupHelper.navigateOrCreatePopup(PsiElementListNavigator.java:206)
	at com.intellij.codeInsight.daemon.impl.PsiElementListNavigator.navigateOrCreatePopup(PsiElementListNavigator.java:133)
	at com.intellij.codeInsight.daemon.impl.PsiElementListNavigator.navigateOrCreatePopup(PsiElementListNavigator.java:110)
	at com.intellij.codeInsight.daemon.impl.PsiElementListNavigator.openTargets(PsiElementListNavigator.java:56)
	at com.intellij.codeInsight.daemon.impl.PsiElementListNavigator.openTargets(PsiElementListNavigator.java:47)
	at com.jetbrains.lang.dart.ide.marker.DartServerImplementationsMarkerProvider.lambda$createMarkerClass$1(DartServerImplementationsMarkerProvider.java:87)
	at com.intellij.codeInsight.daemon.NavigateAction.actionPerformed(NavigateAction.java:47)
	at com.intellij.openapi.actionSystem.ex.ActionUtil.doPerformActionOrShowPopup(ActionUtil.kt:437)
	at com.intellij.openapi.actionSystem.ex.ActionUtil.performAction$lambda$0(ActionUtil.kt:397)
	at com.intellij.openapi.actionSystem.impl.ActionManagerImpl.performWithActionCallbacks$lambda$0(ActionManagerImpl.kt:1164)
	at com.intellij.concurrency.ThreadContext.installThreadContext(threadContext.kt:305)
	at com.intellij.openapi.actionSystem.impl.ActionManagerImpl.performWithActionCallbacks(ActionManagerImpl.kt:1162)
	at com.intellij.openapi.actionSystem.ex.ActionUtil.performAction(ActionUtil.kt:396)
	at com.intellij.openapi.editor.impl.EditorGutterComponentImpl.performAction(EditorGutterComponentImpl.java:2385)
	at com.intellij.openapi.editor.impl.EditorGutterComponentImpl.invokeGutterAction(EditorGutterComponentImpl.java:2324)
	at com.intellij.openapi.editor.impl.EditorGutterComponentImpl.mouseReleased(EditorGutterComponentImpl.java:2297)
	at com.intellij.openapi.editor.impl.EditorImpl.processMouseReleased(EditorImpl.java:2682)
	at com.intellij.openapi.editor.impl.EditorImpl$MyMouseAdapter.lambda$runMouseReleasedCommand$1(EditorImpl.java:4413)
	at com.intellij.openapi.command.impl.CoreCommandProcessor.lambda$executeCommand$2(CoreCommandProcessor.java:143)
	at com.intellij.openapi.application.impl.AppImplKt$rethrowCheckedExceptions$2.invoke(appImpl.kt:126)
	at com.intellij.platform.locking.impl.NestedLocksThreadingSupport.doRunWriteIntentReadAction(NestedLocksThreadingSupport.kt:737)
	at com.intellij.platform.locking.impl.NestedLocksThreadingSupport.runPreventiveWriteIntentReadAction(NestedLocksThreadingSupport.kt:711)
	at com.intellij.platform.locking.impl.NestedLocksThreadingSupport.runWriteIntentReadAction(NestedLocksThreadingSupport.kt:665)
	at com.intellij.openapi.application.impl.ApplicationImpl.runWriteIntentReadAction(ApplicationImpl.java:1185)
	at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:139)
	at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:77)
	at com.intellij.openapi.editor.impl.EditorImpl$MyMouseAdapter.runMouseReleasedCommand(EditorImpl.java:4415)
	at com.intellij.openapi.editor.impl.EditorImpl$MyMouseAdapter.mouseReleased(EditorImpl.java:4295)
	at java.desktop/java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:300)
	at java.desktop/java.awt.Component.processMouseEvent(Component.java:6679)
	at java.desktop/javax.swing.JComponent.processMouseEvent(JComponent.java:3394)
	at java.desktop/java.awt.Component.processEvent(Component.java:6444)
	at java.desktop/java.awt.Container.processEvent(Container.java:2266)
	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.Component.dispatchEvent(Component.java:4877)
	at java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4963)
	at java.desktop/java.awt.LightweightDispatcher.processMouseEvent(Container.java:4577)
	at java.desktop/java.awt.LightweightDispatcher.dispatchEvent(Container.java:4518)
	at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2310)
	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.dispatchMouseEvent(IdeEventQueue.kt:570)
	at com.intellij.ide.IdeEventQueue._dispatchEvent$lambda$2(IdeEventQueue.kt:508)
	at com.intellij.platform.locking.impl.NestedLocksThreadingSupport.doRunWriteIntentReadAction(NestedLocksThreadingSupport.kt:737)
	at com.intellij.platform.locking.impl.NestedLocksThreadingSupport.runPreventiveWriteIntentReadAction(NestedLocksThreadingSupport.kt:711)
	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.kt:508)
	at com.intellij.ide.IdeEventQueue.dispatchEvent$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)

---

IntelliJ IDEA 2025.3.1.1
Build #IU-253.29346.240, built on January 7, 2026