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
Point result= new Point(0, 0);
			Control[] ws= composite.getChildren();
			for (int i= 0; i < ws.length; i++) {
				Control w= ws[i];
				
				boolean hide= false;
				if (getToolBarControl() == w) {
					if (!toolBarChildrenExist()) {
						hide= true;
						result.y+= 23;	
					} 
				} else if (statusLineManager != null && statusLineManager.getControl() == w) {
				} else if (i > 0) { 
					hide= false;
				}
				
				if (! hide) {
					Point e= w.computeSize(wHint, hHint, flushCache);
					result.x= Math.max(result.x, e.x);
					result.y+= e.y + VGAP;
				}
			}
			
			if (wHint != SWT.DEFAULT)
				result.x= wHint;
			if (hHint != SWT.DEFAULT)
				result.y= hHint;
			return result;
		}
		protected void layout(Composite composite, boolean flushCache) {