While working on https://stackoverflow.com/questions/78735443/ I noticed
that creating a PDF/A-*3*b file with a modified CreatePDFA.java example
and having an empty text as second parameter produces a file that is not
valid PDF/A-*3*b according to VeraPDF. When there is a text then all is
OK. I tried to remove the CIDSet entry and then it works, but such a
file would not be valid PDF/A-*1*b.
Thus either there is some PDFBox bug that I haven't understood re the
CIDSet content, or there is a bug in VeraPDF. Thus I have created this
ticket:
https://github.com/veraPDF/veraPDF-library/issues/1462
I believe that the file in SO 78735443 was not created by PDFBox. Their
subset font file has 938 glyphs, with 937 of them empty, our subset font
file doesn't look like that, it has only 1 glyph (the "undefined" one).
Tilman
