Bug 33389 Read-Only files: Quick fix enabled and gets checkmark!
RC1 1. set a file to ready only. 2. Open the file an set the cursor inside 3. Open the 'Edit' menu. Note that 'Quick fix' is enabled, but 'Content assist' is not 4. Choose 'Quick fix' 5. Open the context menu: Quick fix got a checkmark!
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/CompilationUnitEditor.java
} else {
				
				/* 
				 * 1GF5YOX: ITPJUI:ALL - Save of delete file claims it's still there
				 * Missing resources.
				 */
				Shell shell= getSite().getShell();
				MessageDialog.openError(shell, JavaEditorMessages.getString("CompilationUnitEditor.error.saving.title1"), JavaEditorMessages.getString("CompilationUnitEditor.error.saving.message1")); 
			}
			
		} else {	
			
			setStatusLineErrorMessage(null);
			
			IWorkingCopyManager manager= JavaPlugin.getDefault().getWorkingCopyManager();
			ICompilationUnit unit= manager.getWorkingCopy(getEditorInput());
			
			if (unit != null) {
				synchronized (unit) { 
					performSaveOperation(createSaveOperation(false), progressMonitor); 
				}
			} else 
				performSaveOperation(createSaveOperation(false), progressMonitor);
		}
	}
	
	/**
	 * Asks the user if it is ok to store in non-workbench encoding.
	 * @return <true> if the user wants to continue
	 */