Bug 40347 [misc] Renaming a project with an open editor fills log
I20030716+plugin-export 1) have a Java file open in the Java editor 2) rename the enclosing project -> exception in log but no stacktrace
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/CompilationUnitEditor.java
if (SPACES_FOR_TABS.equals(p)) {
					if (isTabConversionEnabled())
						startTabConversion();
					else
						stopTabConversion();
					return;
				}
				IContentAssistant c= asv.getContentAssistant();
				if (c instanceof ContentAssistant)
					ContentAssistPreference.changeConfiguration((ContentAssistant) c, getPreferenceStore(), event);
			}
				
		} finally {
			super.handlePreferenceStoreChanged(event);
		}
	}
	/*
	 * @see org.eclipse.jdt.internal.ui.javaeditor.JavaEditor#handlePreferencePropertyChanged(org.eclipse.core.runtime.Preferences.PropertyChangeEvent)
	 */
	protected void handlePreferencePropertyChanged(org.eclipse.core.runtime.Preferences.PropertyChangeEvent event) {
		AdaptedSourceViewer asv= (AdaptedSourceViewer) getSourceViewer();
		if (asv != null) {
			String p= event.getProperty();					
			if (CODE_FORMATTER_TAB_SIZE.equals(p)) {
				asv.updateIndentationPrefixes();
				if (fTabConverter != null)
					fTabConverter.setNumberOfSpacesPerTab(getTabSize());
			}
		}
		super.handlePreferencePropertyChanged(event);