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
protected void configureShell(Shell shell) {
	super.configureShell(shell);
	
	if (menuBarManager != null) {
		menuBarManager.updateAll(true);
		shell.setMenuBar(menuBarManager.createMenuBar(shell));
	}
	
	shell.setLayout(new ApplicationWindowLayout());
	new Label(shell, SWT.SEPARATOR | SWT.HORIZONTAL);
	createToolBarControl(shell);
	if (statusLineManager != null) {
		statusLineManager.createControl(shell);
	}
}
/**
 * Returns a new menu manager for the window.
 * <p>
 * Subclasses may override this method to customize the menu manager.
 * </p>
 * @return a menu manager
 */
protected MenuManager createMenuManager() {
	return new MenuManager();
}
/**
 * Returns a new status line manager for the window.
 * <p>
 * Subclasses may override this method to customize the status line manager.
 * </p>