[bug #65930] [me] large values of register `tv` cause infinite trap recursion

[G. Branden Robinson]

Follow-up Comment #16, bug #65930 (group groff):

Interestingly, when I applied comment #5's patch to _groff_ Git HEAD, I got
some fuzz and offsets.


$ patch -p1 < me.65930.patch
patching file tmac/e.tmac
Hunk #1 succeeded at 463 with fuzz 1 (offset 4 lines).
Hunk #2 succeeded at 477 (offset 4 lines).


This recent commit accounts for the offset, I think:


commit 188471a29c9315ee45412403be95137f99d9177b
Author: Dave Kemper <saint.snit@gmail.com>
Date:   Sun May 14 02:38:15 2023 +0000

    [me]: Add debugging advice for developers.
    
    Fixes <https://savannah.gnu.org/bugs/?64189>.


The fuzz is more curious.


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