URL: <https://savannah.gnu.org/bugs/?68795>
Summary: [troff] `pcolor` request handler infloops when given
invalid identifier since 1.24.0
Group: GNU roff
Submitter: gbranden
Submitted: Mon 19 Oct 2026 12:59:40 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 12:59:40 AM UTC By: G. Branden Robinson <gbranden>
$ printf '.pcolor red \002 blue\n' | ~/groff-1.24.0/bin/groff 2>&1 | head
red rgb 1.00f 0.00f 0.00f
troff:<standard input>:1: error: character code 2 is not allowed in an
identifier
troff:<standard input>:1: error: character code 2 is not allowed in an
identifier
troff:<standard input>:1: error: character code 2 is not allowed in an
identifier
troff:<standard input>:1: error: character code 2 is not allowed in an
identifier
troff:<standard input>:1: error: character code 2 is not allowed in an
identifier
troff:<standard input>:1: error: character code 2 is not allowed in an
identifier
troff:<standard input>:1: error: character code 2 is not allowed in an
identifier
troff:<standard input>:1: error: character code 2 is not allowed in an
identifier
troff:<standard input>:1: error: character code 2 is not allowed in an
identifier
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