Update of bug #59993 (project groff):
Status: In Progress => Fixed
Open/Closed: Open => Closed
Planned Release: None => 1.23.0
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Follow-up Comment #1:
commit 49a2c2cab0bbed2f3278a368a2e5d9d593dfc7a9 (HEAD -> master,
origin/master, origin/HEAD)
Author: G. Branden Robinson <[email protected]>
Date: Wed Feb 3 17:17:33 2021 +1100
[tbl]: Fix integer overflow of groff register.
* src/preproc/tbl/table.cpp (table::init_output): Save value of
hyphenation maximum consecutive line count register (\n[.hlm]) more
carefully to keep it from being incorrectly parsed as a decrement,
because negative values of \n[.hlm] are valid (in fact, "-1" is the
default). In documents with a large number of tables, this can lead
to a Persian chessboard problem and an integer overflow (at the groff
language level, caught and handled by
src/roff/troff/number.cpp:parse_term()).
It is wise to wrap a non-literal second argument to the .nr request in
parentheses if assignment is desired and its value can be negative.
See section 5.6.1 ("Setting Registers") of the groff Texinfo manual.
Fixes <https://savannah.gnu.org/bugs/?59993>.
Problem introduced by me in commit
cee547e8839a82f8b21b2859a9370fd74f9793f3 on 30 January.
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