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bug in ufo2ft & fonttools causes invalid CFF OTF files #110

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rsms opened this issue Jan 2, 2019 · 3 comments
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bug in ufo2ft & fonttools causes invalid CFF OTF files #110

rsms opened this issue Jan 2, 2019 · 3 comments
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bug Something that is now the way it's supposed to be

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rsms commented Jan 2, 2019

First reported here https://twitter.com/djmarke/status/1080472948039974912

Initial testing shows the OTF files are indeed broken:

$ misc/tools/fontsample/fontsample -o x.pdf build/fonts/const/Inter-UI-Regular.otf
misc/tools/fontsample/fontsample: failed to parse font build/fonts/const/Inter-UI-Regular.otf

$ misc/fontbuild checkfont build/fonts/const/Inter-UI-Regular.otf
Failed to verify the original font
@rsms rsms added the bug Something that is now the way it's supposed to be label Jan 2, 2019
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rsms commented Jan 3, 2019

I've been working on this all morning and have tracked down the issue as far as to the ufo2ft Python library, which produces invalid CFF OTFs when run with Python 3 (but valid files when running with Python 2).

So, there's an issue with either ufo2ft or one of its dependencies that's specific to Python 3.

@rsms rsms changed the title Broken OTFs in v3.2 Python 3 bug in ufo2ft requires Python 2 for compiling OTF CFF files Jan 3, 2019
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rsms commented Jan 3, 2019

Built a repro case and filed an issue with ufo2ft here: googlefonts/ufo2ft#306

@rsms rsms closed this as completed in 799472b Jan 3, 2019
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rsms commented Jan 4, 2019

Related: fonttools/fonttools#1430

@rsms rsms changed the title Python 3 bug in ufo2ft requires Python 2 for compiling OTF CFF files bug in ufo2ft & fonttools causes invalid CFF OTF files Jan 4, 2019
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