java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at com.intellij.diff.actions.impl.OpenInEditorWithMouseAction.(OpenInEditorWithMouseAction.java:39)
at com.intellij.diff.tools.util.side.TwosideTextDiffViewer$MyOpenInEditorWithMouseAction.(TwosideTextDiffViewer.java:330)
at com.intellij.diff.tools.util.side.TwosideTextDiffViewer$MyOpenInEditorWithMouseAction.(TwosideTextDiffViewer.java:330)
at com.intellij.diff.tools.util.side.TwosideTextDiffViewer.(TwosideTextDiffViewer.java:77)
at com.intellij.diff.tools.simple.SimpleDiffViewer.(SimpleDiffViewer.java:75)
at com.intellij.diff.tools.simple.SimpleDiffTool.createComponent(SimpleDiffTool.java:30)
at com.intellij.diff.impl.DiffRequestProcessor.createState(DiffRequestProcessor.java:226)
at com.intellij.diff.impl.DiffRequestProcessor.doApplyRequest(DiffRequestProcessor.java:288)
at com.intellij.diff.impl.DiffRequestProcessor.lambda$applyRequest$58(DiffRequestProcessor.java:262)
at com.intellij.openapi.wm.impl.FocusManagerImpl.flushRequest(FocusManagerImpl.java:634)
at com.intellij.openapi.wm.impl.FocusManagerImpl.flushNow(FocusManagerImpl.java:615)
at com.intellij.openapi.wm.impl.FocusManagerImpl.flushIdleRequests(FocusManagerImpl.java:585)
at com.intellij.openapi.wm.impl.FocusManagerImpl.lambda$doWhenFocusSettlesDown$863(FocusManagerImpl.java:481)
at com.intellij.util.ui.UIUtil.invokeLaterIfNeeded(UIUtil.java:2397)
at com.intellij.openapi.wm.impl.FocusManagerImpl.doWhenFocusSettlesDown(FocusManagerImpl.java:461)
at com.intellij.diff.impl.DiffRequestProcessor.applyRequest(DiffRequestProcessor.java:260)
at com.intellij.diff.impl.CacheDiffRequestProcessor.lambda$null$61(CacheDiffRequestProcessor.java:114)
at com.intellij.openapi.progress.util.BackgroundTaskUtil.finish(BackgroundTaskUtil.java:131)
at com.intellij.diff.util.DiffTaskQueue.executeAndTryWait(DiffTaskQueue.java:47)
at com.intellij.diff.util.DiffTaskQueue.executeAndTryWait(DiffTaskQueue.java:38)
at com.intellij.diff.impl.CacheDiffRequestProcessor.updateRequest(CacheDiffRequestProcessor.java:109)
at com.intellij.diff.impl.CacheDiffRequestProcessor.updateRequest(CacheDiffRequestProcessor.java:89)
at com.intellij.diff.impl.DiffRequestProcessor.updateRequest(DiffRequestProcessor.java:174)
at com.intellij.diff.impl.DiffRequestProcessor.updateRequest(DiffRequestProcessor.java:169)
at com.intellij.diff.impl.DiffWindowBase.lambda$init$65(DiffWindowBase.java:58)
at com.intellij.diff.impl.DiffWindowBase.show(DiffWindowBase.java:67)
at com.intellij.diff.DiffManagerImpl.showDiffBuiltin(DiffManagerImpl.java:77)
at com.intellij.diff.DiffManagerImpl.showDiff(DiffManagerImpl.java:61)
at com.intellij.openapi.vcs.changes.actions.diff.ShowDiffAction.showDiffForChange(ShowDiffAction.java:209)
at com.intellij.openapi.vcs.changes.actions.diff.ShowDiffAction.showDiffForChange(ShowDiffAction.java:191)
at com.intellij.openapi.vcs.changes.actions.diff.ShowDiffAction.showDiffForChange(ShowDiffAction.java:157)
at com.intellij.openapi.vcs.changes.actions.diff.ShowDiffAction$1.run(ShowDiffAction.java:109)
at com.intellij.openapi.vcs.changes.actions.diff.ShowDiffAction.actionPerformed(ShowDiffAction.java:118)
at com.intellij.openapi.actionSystem.EmptyAction$MyDelegatingAction.actionPerformed(EmptyAction.java:112)
at com.intellij.openapi.actionSystem.ex.ActionUtil$1.run(ActionUtil.java:197)
at com.intellij.openapi.application.TransactionGuardImpl.runSyncTransaction(TransactionGuardImpl.java:88)
at com.intellij.openapi.application.TransactionGuardImpl.submitTransactionAndWait(TransactionGuardImpl.java:156)
at com.intellij.openapi.actionSystem.ex.ActionUtil.performActionDumbAware(ActionUtil.java:211)
at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher$1.performAction(IdeKeyEventDispatcher.java:587)
at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.lambda$processAction$132(IdeKeyEventDispatcher.java:634)
at com.intellij.openapi.application.TransactionGuardImpl.performUserActivity(TransactionGuardImpl.java:199)
at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.processAction(IdeKeyEventDispatcher.java:633)
at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.inInitState(IdeKeyEventDispatcher.java:477)
at com.intellij.openapi.keymap.impl.IdeKeyEventDispatcher.dispatchKeyEvent(IdeKeyEventDispatcher.java:211)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:677)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

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