[BUG] java.lang.NullPointerException: getDescription(...) must not be null

Environment

• Claude Code (1.0.61)
• Claude Code[Beta] Pycharm plugin (0.1.11-beta)
• PyCharm (2025.1.3.1)
• MacOS (Sequoia 15.5)

Bug Description

This PyCharm modal pops up seemingly at random times:

java.lang.NullPointerException: getDescription(...) must not be null
at com.anthropic.code.plugin.mcp.tools.DiagnosticTools$addTools$1$1$1.daemonFinished$lambda$0(DiagnosticTools.kt:128)
at com.anthropic.code.plugin.mcp.tools.DiagnosticTools$addTools$1$1$1.daemonFinished$lambda$1(DiagnosticTools.kt:118)
at com.intellij.codeInsight.daemon.impl.DaemonCodeAnalyzerEx.lambda$processHighlights$0(DaemonCodeAnalyzerEx.java:83)
at com.intellij.openapi.editor.impl.MarkupModelImpl.processRangeHighlightersOverlappingWith(MarkupModelImpl.java:284)
at com.intellij.codeInsight.daemon.impl.DaemonCodeAnalyzerEx.processHighlights(DaemonCodeAnalyzerEx.java:76)
at com.intellij.codeInsight.daemon.impl.DaemonCodeAnalyzerEx.processHighlights(DaemonCodeAnalyzerEx.java:62)
at com.intellij.codeInsight.daemon.impl.DaemonCodeAnalyzerEx.processHighlights(DaemonCodeAnalyzerEx.java:49)
at com.anthropic.code.plugin.mcp.tools.DiagnosticTools$addTools$1$1$1.daemonFinished(DiagnosticTools.kt:112)
at com.intellij.codeInsight.daemon.DaemonCodeAnalyzer$DaemonListener.daemonFinished(DaemonCodeAnalyzer.java:98)
at com.intellij.util.messages.impl.MessageBusImplKt.invokeMethod(MessageBusImpl.kt:768)
at com.intellij.util.messages.impl.MessageBusImplKt.invokeListener(MessageBusImpl.kt:712)
at com.intellij.util.messages.impl.MessageBusImplKt.executeOrAddToQueue(MessageBusImpl.kt:533)
at com.intellij.util.messages.impl.MessagePublisher.publish$intellij_platform_core(MessageBusImpl.kt:504)
at com.intellij.util.messages.impl.MessagePublisher.invoke(MessageBusImpl.kt:481)
at jdk.proxy2/jdk.proxy2.$Proxy77.daemonFinished(Unknown Source)
at com.intellij.codeInsight.daemon.impl.DaemonCodeAnalyzerImpl$MyDaemonProgressIndicator.onStop(DaemonCodeAnalyzerImpl.java:1533)
at com.intellij.codeInsight.daemon.impl.DaemonProgressIndicator.stop(DaemonProgressIndicator.java:39)
at com.intellij.codeInsight.daemon.impl.PassExecutorService.lambda$applyInformationToEditorsLater$3(PassExecutorService.java:554)
at com.intellij.openapi.application.TransactionGuardImpl.runWithWritingAllowed(TransactionGuardImpl.java:240)
at com.intellij.openapi.application.TransactionGuardImpl.access$100(TransactionGuardImpl.java:25)
at com.intellij.openapi.application.TransactionGuardImpl$1.run(TransactionGuardImpl.java:202)
at com.intellij.openapi.application.impl.AnyThreadWriteThreadingSupport.runIntendedWriteActionOnCurrentThread$lambda$7(AnyThreadWriteThreadingSupport.kt:319)
at com.intellij.openapi.application.impl.AnyThreadWriteThreadingSupport.runWriteIntentReadAction$lambda$6(AnyThreadWriteThreadingSupport.kt:274)
at com.intellij.openapi.application.impl.AnyThreadWriteThreadingSupport.runWithTemporaryThreadLocal(AnyThreadWriteThreadingSupport.kt:204)
at com.intellij.openapi.application.impl.AnyThreadWriteThreadingSupport.runWriteIntentReadAction(AnyThreadWriteThreadingSupport.kt:274)
at com.intellij.openapi.application.impl.AnyThreadWriteThreadingSupport.runWriteIntentReadAction(AnyThreadWriteThreadingSupport.kt:222)
at com.intellij.openapi.application.impl.AnyThreadWriteThreadingSupport.runIntendedWriteActionOnCurrentThread(AnyThreadWriteThreadingSupport.kt:318)
at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:928)
at com.intellij.openapi.application.impl.ApplicationImpl$4.run(ApplicationImpl.java:501)
at com.intellij.util.concurrency.ChildContext$runInChildContext$1.invoke(propagation.kt:102)
at com.intellij.util.concurrency.ChildContext$runInChildContext$1.invoke(propagation.kt:102)
at com.intellij.util.concurrency.ChildContext.runInChildContext(propagation.kt:108)
at com.intellij.util.concurrency.ChildContext.runInChildContext(propagation.kt:102)
at com.intellij.util.concurrency.ContextRunnable.run(ContextRunnable.java:27)
at com.intellij.openapi.application.impl.FlushQueue.runNextEvent(FlushQueue.java:117)
at com.intellij.openapi.application.impl.FlushQueue.flushNow(FlushQueue.java:43)
at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:318)
at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:781)
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.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:750)
at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.kt:585)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.kt:482)
at com.intellij.ide.IdeEventQueue.dispatchEvent$lambda$12$lambda$11$lambda$10$lambda$9(IdeEventQueue.kt:307)
at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:864)
at com.intellij.ide.IdeEventQueue.dispatchEvent$lambda$12$lambda$11$lambda$10(IdeEventQueue.kt:306)
at com.intellij.ide.IdeEventQueueKt.performActivity$lambda$3(IdeEventQueue.kt:958)
at com.intellij.openapi.application.TransactionGuardImpl.performActivity(TransactionGuardImpl.java:117)
at com.intellij.ide.IdeEventQueueKt.performActivity(IdeEventQueue.kt:958)
at com.intellij.ide.IdeEventQueue.dispatchEvent$lambda$12(IdeEventQueue.kt:301)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.kt:341)
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:871)
at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl.show(DialogWrapperPeerImpl.java:458)
at com.intellij.openapi.ui.DialogWrapper.doShow(DialogWrapper.java:1815)
at com.intellij.openapi.ui.DialogWrapper.show(DialogWrapper.java:1764)
at com.intellij.openapi.ui.DialogBuilder.showImpl(DialogBuilder.java:77)
at com.intellij.openapi.ui.DialogBuilder.show(DialogBuilder.java:44)
at com.intellij.openapi.fileEditor.impl.MemoryDiskConflictResolver.askReloadFromDisk(MemoryDiskConflictResolver.java:125)
at com.intellij.openapi.fileEditor.impl.MemoryDiskConflictResolver.processConflicts(MemoryDiskConflictResolver.java:77)
at com.intellij.openapi.fileEditor.impl.MemoryDiskConflictResolver.lambda$beforeContentChange$0(MemoryDiskConflictResolver.java:61)
at com.intellij.openapi.application.TransactionGuardImpl.runWithWritingAllowed(TransactionGuardImpl.java:240)
at com.intellij.openapi.application.TransactionGuardImpl.access$100(TransactionGuardImpl.java:25)
at com.intellij.openapi.application.TransactionGuardImpl$1.run(TransactionGuardImpl.java:202)
at com.intellij.openapi.application.impl.AnyThreadWriteThreadingSupport.runIntendedWriteActionOnCurrentThread$lambda$7(AnyThreadWriteThreadingSupport.kt:319)
at com.intellij.openapi.application.impl.AnyThreadWriteThreadingSupport.runWriteIntentReadAction$lambda$6(AnyThreadWriteThreadingSupport.kt:274)
at com.intellij.openapi.application.impl.AnyThreadWriteThreadingSupport.runWithTemporaryThreadLocal(AnyThreadWriteThreadingSupport.kt:204)
at com.intellij.openapi.application.impl.AnyThreadWriteThreadingSupport.runWriteIntentReadAction(AnyThreadWriteThreadingSupport.kt:274)
at com.intellij.openapi.application.impl.AnyThreadWriteThreadingSupport.runWriteIntentReadAction(AnyThreadWriteThreadingSupport.kt:222)
at com.intellij.openapi.application.impl.AnyThreadWriteThreadingSupport.runIntendedWriteActionOnCurrentThread(AnyThreadWriteThreadingSupport.kt:318)
at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:928)
at com.intellij.openapi.application.impl.ApplicationImpl$4.run(ApplicationImpl.java:501)
at com.intellij.util.concurrency.ChildContext$runInChildContext$1.invoke(propagation.kt:102)
at com.intellij.util.concurrency.ChildContext$runInChildContext$1.invoke(propagation.kt:102)
at com.intellij.util.concurrency.ChildContext.runInChildContext(propagation.kt:108)
at com.intellij.util.concurrency.ChildContext.runInChildContext(propagation.kt:102)
at com.intellij.util.concurrency.ContextRunnable.run(ContextRunnable.java:27)
at com.intellij.openapi.application.impl.FlushQueue.runNextEvent(FlushQueue.java:117)
at com.intellij.openapi.application.impl.FlushQueue.flushNow(FlushQueue.java:43)
at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:318)
at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:781)
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.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:750)
at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.kt:585)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.kt:482)
at com.intellij.ide.IdeEventQueue.dispatchEvent$lambda$12$lambda$11$lambda$10$lambda$9(IdeEventQueue.kt:307)
at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:864)
at com.intellij.ide.IdeEventQueue.dispatchEvent$lambda$12$lambda$11$lambda$10(IdeEventQueue.kt:306)
at com.intellij.ide.IdeEventQueueKt.performActivity$lambda$3(IdeEventQueue.kt:958)
at com.intellij.openapi.application.TransactionGuardImpl.performActivity(TransactionGuardImpl.java:109)
at com.intellij.ide.IdeEventQueueKt.performActivity(IdeEventQueue.kt:958)
at com.intellij.ide.IdeEventQueue.dispatchEvent$lambda$12(IdeEventQueue.kt:301)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.kt:341)
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. Just working with the Claude Code plugin