[bug #68513] [troff] document limit on range of indexed character indices

"G. Branden Robinson" <[email protected]> Sat, 11 Jul 2026 23:22:27 -0400 (EDT)

Newsgroups	gmane.comp.printing.groff.bugs
Message-ID	<[email protected]>

URL:
  <https://savannah.gnu.org/bugs/?68513>

                 Summary: [troff] document limit on range of indexed character
indices
                   Group: GNU roff
               Submitter: gbranden
               Submitted: Sun 12 Jul 2026 03:22:24 AM UTC
                Category: Core
                Severity: 3 - Normal
              Item Group: Documentation
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Unlocked
         Planned Release: None


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Follow-up Comments:


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Date: Sun 12 Jul 2026 03:22:24 AM UTC By: G. Branden Robinson <gbranden>
This is nowhere documented, but the valid range is 0-255.

Since modern fonts can contain many more than 256 glyphs, we might need to
revisit that limit and the underlying implementation, which uses a static
memory allocation.

But for now, document it.







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