[varLib] Assert that we found the base master

2016-04-17 11:53:20 -07:00 · 2016-04-17 11:53:20 -07:00 · 2312880d79
commit 2312880d79
parent f7bfaff29c
1 changed files with 1 additions and 0 deletions
--- a/Lib/fontTools/varLib/init.py
+++ b/Lib/fontTools/varLib/init.py
@ -400,6 +400,7 @@ def main(args=None):
 	outfile = os.path.splitext(designspace_filename)[0] + '-GX.ttf'

 	masters, instances, base_idx = designspace_load(designspace_filename)
+	assert base_idx is not None, "Cannot find 'base' master; Add <info> element to one of the masters in the .designspace document."

 	from pprint import pprint
 	print("Masters:")