traceback

traceback — Print or retrieve a stack traceback

try:
        set_main_module(Context.run_dir + os.sep + Context.WSCRIPT_FILE)
    except Errors.WafError as e:
        Logs.pprint('RED', e.verbose_msg)
        Logs.error(str(e))
        sys.exit(1)
    except Exception as e:
        Logs.error('Waf: The wscript in %r is unreadable' % Context.run_dir, e)
        traceback.print_exc(file=sys.stdout)
        sys.exit(2)