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Raspberry pi 3 (raspbian Debian Jessie) -> FTC_SBitCache_Lookup failed #18

@damagedspline

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@damagedspline

I am getting the following crash when running the pcd8544 test with either the rpi-hw that came from apk and from a manually built one:

terminate called after throwing an instance of 'rpihw::exception_class'
what(): /home/pi/rpihw/Rpi-hw/src/font/freetype.cpp:112:
(Fatal) freetype->getSBitChar: FTC_SBitCache_Lookup failed with /usr/share/fonts/truetype/droid/DroidSerif-Bold.ttf

Edit: FTC_SBitCache_Lookup return error code 6 ("Invalid argument")

Edit 2: Some tests have shown that glyph_index is not a positive value which might pose an issue according to http://www.sivachandran.in/2009/04/freetype-2-caching.html
This is as far as I can go as I have no real experience with freetype...

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