human
Solve the following python programming problem given the following code:
def die_on_error(msg) : 
    'Decorator that catches errors, displays a popup message, and quits' 
    def decorator(func) : 
        def wrapper(* args, **kwargs) : 
            try : 
                return func (* args, ** kwargs) 
except Exception as e : 
                import traceback 
                from glue.external.qt import get_qapp 
                get_qapp () 
                from glue.utils.qt import QMessageBoxPatched as QMessageBox 
                m = ('%s
%s' % (msg, e)) 
                detail = str (traceback.format_exc ()) 
                if (len (m) > 500) : 
                    detail = ('Full message:

%s

%s' % (m, detail)) 
                    m = (m [: 500] + '...') 
qmb = QMessageBox (QMessageBox.Critical, 'Error', m) 
                qmb.setDetailedText (detail) 
                qmb.show () 
                qmb.raise_ () 
                qmb.exec_ () 
                sys.exit (1) 
return wrapper 
return msg 

    
    

    Fix the buggy line: return msg
assistant
#Here is Python code to fix the buggy line: return msg
.

return def decorator(