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[merge] Fix AssertionError when all DefaultLangSys offsets are NULL

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Fixes https://github.com/fonttools/fonttools/issues/1408#issuecomment-447316250
This commit is contained in:
Cosimo Lupo 2018-12-17 13:30:47 +00:00
parent 74ec7cec2a
commit 135a4a1914
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GPG Key ID: 59D54DB0C9976482
1 changed files with 5 additions and 1 deletions
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6
Lib/fontTools/merge.py
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@ -498,7 +498,11 @@ def mergeScripts(lst):
self = otTables.Script()
self.LangSysRecord = lsrecords
self.LangSysCount = len(lsrecords)
self.DefaultLangSys = mergeLangSyses([s.DefaultLangSys for s in lst if s.DefaultLangSys])
dfltLangSyses = [s.DefaultLangSys for s in lst if s.DefaultLangSys]
if dfltLangSyses:
self.DefaultLangSys = mergeLangSyses(dfltLangSyses)
else:
self.DefaultLangSys = None
return self
def mergeScriptRecords(lst):