[NTG-pdftex] \pdffontobjnum assertion failed

[Hironobu Yamashita]

Looking more deeply, I found that LuaTeX also causes

Assertion failed: (fo->last_char>=fo->first_char), function create_fontdictionary, file ../../../texk/web2c/luatexdir/font/writefont.w, line 683.
Abort trap: 6

when

    if (!font_has_subset(f))
        return;

inside do_pdf_font() is removed. Therefore, it seems that
the pdfTeX issue can be avoided by applying the attached patch.

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Hironobu Yamashita