# 8243 Error while debugging

I started running an application in debug mode & switched to the debug console view. Shortly after, while the app was initialising, this error appeared ('Blame IDEA core' wasn't enabled):

Error during dispatching of java.awt.event.InvocationEvent[INVOCATION_DEFAULT,runnable=javax.swing.Timer$DoPostEvent@b344e4,notifier=null,catchExceptions=false,when=1207738322210] on sun.awt.windows.WToolkit@ade1b6
java.lang.AssertionError
at com.intellij.execution.ui.layout.impl.RunnerContentUi.findCellFor(RunnerContentUi.java:206)
at com.intellij.execution.ui.layout.actions.BaseRunnerViewAction.isDetached(BaseRunnerViewAction.java:9)
at com.intellij.execution.ui.layout.actions.MoveToGridAction.update(MoveToGridAction.java:6)
at com.intellij.execution.ui.layout.actions.BaseRunnerViewAction.update(BaseRunnerViewAction.java:14)
at com.intellij.ui.tabs.impl.JBTabsImpl$ActionButton.update(JBTabsImpl.java:2019)
at com.intellij.ui.tabs.impl.JBTabsImpl$ActionPanel.update(JBTabsImpl.java:1975)
at com.intellij.ui.tabs.impl.JBTabsImpl$TabLabel.updateTabActions(JBTabsImpl.java:1692)
at com.intellij.ui.tabs.impl.JBTabsImpl.updateTabActions(JBTabsImpl.java:243)
at com.intellij.ui.tabs.impl.JBTabsImpl.run(JBTabsImpl.java:238)
at com.intellij.openapi.actionSystem.impl.ActionManagerImpl$MyTimer.a(ActionManagerImpl.java:4)
at com.intellij.openapi.actionSystem.impl.ActionManagerImpl$MyTimer.actionPerformed(ActionManagerImpl.java:3)
at javax.swing.Timer.fireActionPerformed(Timer.java:271)
at javax.swing.Timer$DoPostEvent.run(Timer.java:201)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:597)
at com.intellij.ide.IdeEventQueue.c(IdeEventQueue.java:32)
at com.intellij.ide.IdeEventQueue.b(IdeEventQueue.java:21)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:36)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)

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