don't error when there are zero code points

2022-08-27 10:29:12 +02:00 · 2022-08-27 10:29:12 +02:00 · 8af6c16b6a
commit 8af6c16b6a
parent 9cb418cbfc
1 changed files with 1 additions and 1 deletions
--- a/Lib/fontTools/fontBuilder.py
+++ b/Lib/fontTools/fontBuilder.py
@ -391,7 +391,7 @@ class FontBuilder(object):
        sequence, but this is not policed.
        """
        subTables = []
-        highestUnicode = max(cmapping)
+        highestUnicode = max(cmapping) if cmapping else 0
        if highestUnicode > 0xFFFF:
            cmapping_3_1 = dict((k, v) for k, v in cmapping.items() if k < 0x10000)
            subTable_3_10 = buildCmapSubTable(cmapping, 12, 3, 10)