message: BUG: tf.function cannot handle exception raised by custom op
diff: @@ -165,6 +165,7 @@ class ErrorMetadataBase(object):
  frame_info.function_name,
  ' *' if frame_info.converted else '',
  ))
  + if frame_info.code:
  lines.append(' {}'.format(frame_info.code.strip()))
  lines.append('')
  