Bug 25955 [Workbench] Exiting while saving can cause problems
This seems to be a problem with either the workbench in general or the editor structure in particular. I have reproduced this with the Java editor but there is no reason why it wouldn't occur with other editors as well. Dirty a Java editor. Press Ctrl+S to save the editor. While it is saving, quickly close the main perspective window, either by clicking the X or by choosing File->Save. When prompted to save dirty resources say Okay. An error dialog appears stating that the save failed, and a stack trace is printed to the log (sorry, I don't have my log anymore, but it's fairly easy to reproduce). The dialog says: "Problems occurred while trying to save the state of the workbench." Details: "Save cannot be called from inside an operation." I guess the real problem is that I'm able to exit while a workspace operation is taking place. Reproduced on both Win2K and Linux.
bundles/org.eclipse.ui.workbench/extensions/org/eclipse/jface/window/ApplicationWindow.java
/**
	 * Menu bar manager, or <code>null</code> if none (default).
	 *
	 * @see #addMenuBar
	 */
	private MenuManager menuBarManager = null;
	/**
	 * Tool bar manager, or <code>null</code> if none (default).
	 *
	 * @see #addToolBar
	 */
	private ToolBarManager toolBarManager = null;
	/**
	 * Status line manager, or <code>null</code> if none (default).
	 *
	 * @see #addStatusLine
	 */
	private StatusLineManager statusLineManager = null;
	
	/**
	 * Internal application window layout class.
	 * This vertical layout supports a tool bar area (fixed size),
	 * a separator line, the content area (variable size), and a 
	 * status line (fixed size).
	 */
	 class ApplicationWindowLayout extends Layout {