[bug #66111] Nonexistent character reported by diagnostic unrelated to character in input

[Dave]

URL:
  <https://savannah.gnu.org/bugs/?66111>

                 Summary: Nonexistent character reported by diagnostic
unrelated to character in input
                   Group: GNU roff
               Submitter: barx
               Submitted: Mon 19 Aug 2024 02:33:26 PM CDT
                Category: Core
                Severity: 2 - Minor
              Item Group: Warning/Suspicious behaviour
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any


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Follow-up Comments:


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Date: Mon 19 Aug 2024 02:33:26 PM CDT By: Dave <barx>

$ echo '\[vs]' | groff -z -Tutf8
$ echo '\[vs]' | groff -z -Tlatin1
troff:<standard input>:1: warning: special character 'ah' not defined

The warning is expected, as _š_ does not exist in Latin-1.  But the character
reported is weird.

Groff 1.22.4 correctly reported "can't find special character 'vs'."  The
diagnostic is wrong in 1.23 and git HEAD.







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