[bug #65427] troff segfaults when output file flush fails

[G. Branden Robinson]

Update of bug #65427 (group groff):

                Severity:              3 - Normal => 4 - Important          
                  Status:                    None => In Progress            
             Assigned to:                    None => gbranden               

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Follow-up Comment #1:

Claiming.  Bumping to Important severity.  SEGVs are bad, even if it's man-db
_man_(1)'s use of AppArmor imposing them on it.

Will be checking for performance impact, since this hits (nearly) every byte
produced in _grout_ output.  (Also "groff -a" output, but that's not likely to
be performance-sensitive.)


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