[bug #65980] emit (better) diagnostics on bad input files

[Dave]

URL:
  <https://savannah.gnu.org/bugs/?65980>

                 Summary: emit (better) diagnostics on bad input files
                   Group: GNU roff
               Submitter: barx
               Submitted: Fri 12 Jul 2024 04:53:28 PM CDT
                Category: General
                Severity: 2 - Minor
              Item Group: Warning/Suspicious behaviour
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: None


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Follow-up Comments:


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Date: Fri 12 Jul 2024 04:53:28 PM CDT By: Dave <barx>
When groff is given a directory name as an input "file," it silently ignores
it.  Some preprocessors are not so charitable but still obscure the nature of
the problem.

$ groff -ww /tmp
$ groff -t -ww /tmp
grops:<standard input>:(/tmp):6: fatal error: 'V' command invalid before first
'p' command









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