URL: <https://savannah.gnu.org/bugs/?68839>
Summary: [troff] could be more helpful when `ft` request
given bogus argument
Group: GNU roff
Submitter: gbranden
Submitted: Mon 26 Oct 2026 04:06:20 AM UTC
Category: Formatter
Severity: 1 - Wish
Item Group: Warning/Suspicious behaviour
Status: Confirmed
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 26 Oct 2026 04:06:20 AM UTC By: G. Branden Robinson <gbranden>
$ printf '.ft \002\n' | ./build/test-groff -z -ww
troff:<standard input>:1: error: ignoring identifier containing invalid
character code 2
$ for v in 1.22.3 1.22.4 1.23.0 1.24.0 1.24.1 1.24.2; do echo "---- groff $v
---"; printf '.ft \002\n' | ~/groff-$v/bin/groff -z -ww; done
---- groff 1.22.3 ---
<standard input>:1: warning: can't find font `'
---- groff 1.22.4 ---
troff: <standard input>:1: warning: can't find font ''
---- groff 1.23.0 ---
troff:<standard input>:1: warning: cannot select font ''
---- groff 1.24.0 ---
troff:<standard input>:1: error: character code 2 is not allowed in an
identifier
---- groff 1.24.1 ---
troff:<standard input>:1: error: character code 2 is not allowed in an
identifier
---- groff 1.24.2 ---
troff:<standard input>:1: error: character code 2 is not allowed in an
identifier
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