URL: <https://savannah.gnu.org/bugs/?68797>
Summary: [troff] assertion failure when `rn` given invalid
first identifier
Group: GNU roff
Submitter: gbranden
Submitted: Mon 19 Oct 2026 02:33:28 AM UTC
Category: Formatter
Severity: 4 - Important
Item Group: Crash/Unresponsive
Status: In Progress
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 19 Oct 2026 02:33:28 AM UTC By: G. Branden Robinson <gbranden>
$ printf '.rn \002 device\n' | ~/groff-1.24.2/bin/groff -ww
troff:<standard input>:1: error: character code 2 is not allowed in an
identifier
troff: ../src/roff/troff/input.cpp:5646: void rename_macro(): Assertion `s1 !=
0' failed.
/home/branden/groff-1.24.2/bin/groff: error: troff: Aborted (core dumped)
A bogus second argument exhibits expected behavior.
$ printf '.rn .T \002\n' | ~/groff-1.24.2/bin/groff -ww
troff:<standard input>:1: error: character code 2 is not allowed in an
identifier
troff:<standard input>:1: warning: renaming request expects identifier of
existing request, macro, string, or diversion as second argument
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