Forgot import in #12639

IPython/core/magics/script.py

@@ -11,6 +11,8 b' import time'
 import asyncio
 import atexit
 
+from subprocess import CalledProcessError
+
 from IPython.core import magic_arguments
 from IPython.core.magic import  (
     Magics, magics_class, line_magic, cell_magic
@@ -20,6 +22,7 b' from IPython.utils import py3compat'
 from IPython.utils.process import arg_split
 from traitlets import List, Dict, default
 
+
 #-----------------------------------------------------------------------------
 # Magic implementation classes
 #-----------------------------------------------------------------------------