URL: <https://savannah.gnu.org/bugs/?67783>
Summary: [troff] enable warnings in category "syntax" by
default
Group: GNU roff
Submitter: gbranden
Submitted: Sun 07 Dec 2025 02:28:05 PM UTC
Category: Core
Severity: 1 - Wish
Item Group: Feature change
Status: Postponed
Privacy: Public
Assigned to: None
Open/Closed: Open
Discussion Lock: Unlocked
Planned Release: None
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Follow-up Comments:
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Date: Sun 07 Dec 2025 02:28:05 PM UTC By: G. Branden Robinson <gbranden>
I desire this for _groff_ 1.25. I believe it will reduce user confusion and
frustration.
$ printf '\\C\\h"2m"bogus\\h"2m"\n' | tg -a
troff: backtrace: file '<standard input>':1
troff:<standard input>:1: warning: cannot use a horizontal motion to delimit a
name
<beginning of page>
bogus
Without the warning, why "bogus" appears as formatted text would be a deep
mystery.
More realistically, a recent change to ban _all_ horizontal motions from use
as escape sequence delimiters means that the following slightly more plausible
input can occur.
$ printf '\\C\\0bogus\\0\n' | tg -a
troff: backtrace: file '<standard input>':1
troff:<standard input>:1: warning: cannot use a horizontal motion to delimit a
name
<beginning of page>
bogus
...and similarly for `\^` and `\|` instead of `\0`.
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