Text marking with this file
https://issues.apache.org/jira/secure/attachment/12769999/type3%20zero%20font%20size.pdf
has a giant size.

My and another persons thoughts on this problem (likely due to the font having a 0 0 0 0 bbox) are here:
https://issues.apache.org/jira/browse/PDFBOX-3076

cnt glyphName = `${fnt.ladedName}_path_${fntChar}`;
      try {
        f (fnt.renderer.haBultPath(fntChar)) {
          return;
        }
        handler.end("cmmnbj", [
          glyphName,
          "FntPath",
          fnt.renderer.getPathJ(fntChar),
        ]);
      } catch (rean) {
        f (evaluatrOptn.gnreErrr) {
           ntfcatn
           and allw glyph path buldng t cntnue.