[bug #68395] [troff] assertion failure in `define_character()` when `fschar` missing arguments after the first

"G. Branden Robinson" <[email protected]>
Newsgroups gmane.comp.printing.groff.bugs
Message-ID <[email protected]>
URL:
  <https://savannah.gnu.org/bugs/?68395>

                 Summary: [troff] assertion failure in `define_character()`
when `fschar` missing arguments after the first
                   Group: GNU roff
               Submitter: gbranden
               Submitted: Mon 25 May 2026 03:10:09 AM UTC
                Category: Core
                Severity: 4 - Important
              Item Group: Crash/Unresponsive
                  Status: In Progress
                 Privacy: Public
             Assigned to: gbranden
             Open/Closed: Open
         Discussion Lock: Unlocked
         Planned Release: None


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Follow-up Comments:


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Date: Mon 25 May 2026 03:10:09 AM UTC By: G. Branden Robinson <gbranden>

$ groff --version | head -n 1
GNU groff version 1.24.1
$ echo '.fschar S' | groff
troff: ../src/roff/troff/input.cpp:5116: void define_character(char_mode,
const char*): Assertion `0 == "attempted to use token without charinfo in
character" " definition request"' failed.
groff: error: troff: Aborted (core dumped)









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