[bug #68521] [troff] assertion failure in `void charinfo::set_number(int)`: (n >= 0)

"G. Branden Robinson" <[email protected]> Mon, 13 Jul 2026 10:58:16 -0400 (EDT)

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

URL:
  <https://savannah.gnu.org/bugs/?68521>

                 Summary: [troff] assertion failure in `void
charinfo::set_number(int)`: (n >= 0)
                   Group: GNU roff
               Submitter: gbranden
               Submitted: Mon 13 Jul 2026 02:58:13 PM UTC
                Category: Core
                Severity: 4 - Important
              Item Group: Crash/Unresponsive
                  Status: None
                 Privacy: Public
             Assigned to: gbranden
             Open/Closed: Open
         Discussion Lock: Unlocked
         Planned Release: None


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Follow-up Comments:


-------------------------------------------------------
Date: Mon 13 Jul 2026 02:58:13 PM UTC By: G. Branden Robinson <gbranden>
Regressed in _groff_ 1.24.0.

```
$ printf '\\N"-1"\n' | ~/groff-1.24.1/bin/groff -z
troff: ../src/roff/troff/input.cpp:10981: void charinfo::set_number(int):
Assertion `n >= 0' failed.
/home/branden/groff-1.24.1/bin/groff: error: troff: Aborted (core dumped)
$ printf '\\N"-1"\n' | ~/groff-1.23.0/bin/groff -z
troff:<standard input>:1: warning: invalid numbered character -1
```







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