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This exception has no message.
java.lang.NullPointerException: 	at com.google.cloud.tools.intellij.debugger.ui.CloudAttachDialog.syncOrStash(CloudAttachDialog.java:415)	at com.google.cloud.tools.intellij.debugger.ui.CloudAttachDialog.doOKAction(CloudAttachDialog.java:175)	at com.intellij.openapi.ui.DialogWrapper$OkAction.doAction(DialogWrapper.java:1871)	at com.intellij.openapi.ui.DialogWrapper$DialogWrapperAction.actionPerformed(DialogWrapper.java:1837)	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)	at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)	at javax.swing.AbstractButton.doClick(AbstractButton.java:376)	at javax.swing.plaf.basic.BasicRootPaneUI$Actions.actionPerformed(BasicRootPaneUI.java:208)	at javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1663)	at javax.swing.JComponent.processKeyBinding(JComponent.java:2882)	at javax.swing.KeyboardManager.fireBinding(KeyboardManager.java:307)	at javax.swing.KeyboardManager.fireKeyboardAction(KeyboardManager.java:250)	at javax.swing.JComponent.processKeyBindingsForAllComponents(JComponent.java:2974)	at javax.swing.JComponent.processKeyBindings(JComponent.java:2966)	at javax.swing.JComponent.processKeyEvent(JComponent.java:2845)	at java.awt.Component.processEvent(Component.java:6310)	at java.awt.Container.processEvent(Container.java:2236)	at java.awt.Component.dispatchEventImpl(Component.java:4889)	at java.awt.Container.dispatchEventImpl(Container.java:2294)	at java.awt.Component.dispatchEvent(Component.java:4711)	at java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1954)	at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:806)	at java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1074)	at java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:945)	at java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:771)	at com.intellij.ide.IdeKeyboardFocusManager.dispatchEvent(IdeKeyboardFocusManager.java:27)	at java.awt.Component.dispatchEventImpl(Component.java:4760)	at java.awt.Container.dispatchEventImpl(Container.java:2294)	at java.awt.Window.dispatchEventImpl(Window.java:2746)	at java.awt.Component.dispatchEvent(Component.java:4711)	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)	at java.awt.EventQueue.access$500(EventQueue.java:97)	at java.awt.EventQueue$3.run(EventQueue.java:709)	at java.awt.EventQueue$3.run(EventQueue.java:703)	at java.security.AccessController.doPrivileged(Native Method)	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)	at java.awt.EventQueue$4.run(EventQueue.java:731)	at java.awt.EventQueue$4.run(EventQueue.java:729)	at java.security.AccessController.doPrivileged(Native Method)	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)	at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)	at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:843)	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:658)	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:391)	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:109)	at java.awt.WaitDispatchSupport$2.run(WaitDispatchSupport.java:184)	at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:229)	at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:227)	at java.security.AccessController.doPrivileged(Native Method)	at java.awt.WaitDispatchSupport.enter(WaitDispatchSupport.java:227)	at java.awt.Dialog.show(Dialog.java:1084)	at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl$MyDialog.show(DialogWrapperPeerImpl.java:779)	at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl.show(DialogWrapperPeerImpl.java:457)	at com.intellij.openapi.ui.DialogWrapper.invokeShow(DialogWrapper.java:1693)	at com.intellij.openapi.ui.DialogWrapper.show(DialogWrapper.java:1635)	at git4idea.DialogManager.showDialog(DialogManager.java:56)	at git4idea.DialogManager.show(DialogManager.java:23)	at com.google.cloud.tools.intellij.debugger.CloudDebuggerRunner$1.start(CloudDebuggerRunner.java:111)	at com.intellij.xdebugger.impl.XDebuggerManagerImpl.startSession(XDebuggerManagerImpl.java:219)	at com.intellij.xdebugger.impl.XDebuggerManagerImpl.startSession(XDebuggerManagerImpl.java:181)	at com.google.cloud.tools.intellij.debugger.CloudDebuggerRunner.createContentDescriptor(CloudDebuggerRunner.java:95)	at com.google.cloud.tools.intellij.debugger.CloudDebuggerRunner.doExecute(CloudDebuggerRunner.java:82)	at com.intellij.execution.runners.GenericProgramRunner$1.execute(GenericProgramRunner.java:43)	at com.intellij.execution.impl.ExecutionManagerImpl.lambda$startRunProfile$3(ExecutionManagerImpl.java:384)	at com.intellij.openapi.application.TransactionGuardImpl.runSyncTransaction(TransactionGuardImpl.java:91)	at com.intellij.openapi.application.TransactionGuardImpl.access$300(TransactionGuardImpl.java:41)	at com.intellij.openapi.application.TransactionGuardImpl$2.run(TransactionGuardImpl.java:116)	at com.intellij.openapi.application.TransactionGuardImpl.submitTransaction(TransactionGuardImpl.java:126)	at com.intellij.openapi.application.TransactionGuard.submitTransaction(TransactionGuard.java:122)	at com.intellij.execution.impl.ExecutionManagerImpl.lambda$startRunProfile$4(ExecutionManagerImpl.java:441)	at com.intellij.execution.impl.ExecutionManagerImpl.compileAndRun(ExecutionManagerImpl.java:296)	at com.intellij.execution.impl.ExecutionManagerImpl.startRunProfile(ExecutionManagerImpl.java:441)	at com.intellij.execution.runners.GenericProgramRunner.execute(GenericProgramRunner.java:40)	at com.intellij.execution.runners.BaseProgramRunner.execute(BaseProgramRunner.java:61)	at com.intellij.execution.runners.BaseProgramRunner.execute(BaseProgramRunner.java:50)	at com.intellij.execution.ProgramRunnerUtil.executeConfiguration(ProgramRunnerUtil.java:118)	at com.intellij.execution.impl.ExecutionManagerImpl.start(ExecutionManagerImpl.java:121)	at com.intellij.execution.impl.ExecutionManagerImpl.access$300(ExecutionManagerImpl.java:68)	at com.intellij.execution.impl.ExecutionManagerImpl$3.run(ExecutionManagerImpl.java:533)	at com.intellij.util.concurrency.QueueProcessor.runSafely(QueueProcessor.java:223)	at com.intellij.util.Alarm$Request$1.run(Alarm.java:387)	at com.intellij.openapi.application.TransactionGuardImpl$6.run(TransactionGuardImpl.java:318)	at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.runNextEvent(LaterInvocator.java:417)	at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.run(LaterInvocator.java:401)	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)	at java.awt.EventQueue.access$500(EventQueue.java:97)	at java.awt.EventQueue$3.run(EventQueue.java:709)	at java.awt.EventQueue$3.run(EventQueue.java:703)	at java.security.AccessController.doPrivileged(Native Method)	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)	at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)	at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:843)	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:679)	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:391)	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)