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[bug #63581] "nroff -mom sample_docs.mom" causes infinite loop
From: |
Dave |
Subject: |
[bug #63581] "nroff -mom sample_docs.mom" causes infinite loop |
Date: |
Fri, 6 Jan 2023 19:11:48 -0500 (EST) |
Follow-up Comment #19, bug #63581 (project groff):
[comment #17 comment #17:]
> I think there is a possible (3): When groff encounters an
> infinite loop type situation it breaks the loop and returns an
> error exit code to the user.
Groff will sometimes emit "fatal error: input stack limit exceeded (probable
infinite loop)" (see, e.g.,
http://lists.gnu.org/r/groff/2022-11/msg00137.html). But it's also trivial to
create an infinite loop that groff will never detect:
echo '.while 1 .nr a 1' | groff
And you're right that in the general case, the situation is not detectable.
But you may be in luck: it looks like Deri has donned the RCA Man cape, and
maybe the condition causing this lockup will turn out to be simple to fix.
> In short yes - yes, that might work - mostly because that
> particular option indicates when it hyphenates words (using a
> <hy>) - the other options I'd seen that printed to the
> terminal didn't - they just broke the word across lines.
Yes, I've often found that aspect of -a output useful.
But also, in the final analysis, any algorithmic count will be an
approximation. A human reader can recognize "doctor-patient relationship" as
three words but "pre-industrial civilization" as two, but try teaching an
algorithm that distinction without bringing AI into it. Hyphens are sometimes
word dividers and sometimes not.
> I thought I had cracked it with '-Z -T utf8', but not so...
Ah, earlier I missed that you were using -Z rather than the postprocessed
output, so my trying to point the finger at grotty was misplaced.
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- [bug #63581] "nroff -mom sample_docs.mom" causes infinite loop, (continued)
- [bug #63581] "nroff -mom sample_docs.mom" causes infinite loop, Peter Schaffter, 2023/01/01
- [bug #63581] "nroff -mom sample_docs.mom" causes infinite loop, Gene, 2023/01/02
- [bug #63581] "nroff -mom sample_docs.mom" causes infinite loop, Peter Schaffter, 2023/01/02
- [bug #63581] "nroff -mom sample_docs.mom" causes infinite loop, Dave, 2023/01/06
- [bug #63581] "nroff -mom sample_docs.mom" causes infinite loop, Peter Schaffter, 2023/01/06
- [bug #63581] "nroff -mom sample_docs.mom" causes infinite loop, Dave, 2023/01/06
- [bug #63581] "nroff -mom sample_docs.mom" causes infinite loop, Dave, 2023/01/06
- [bug #63581] "nroff -mom sample_docs.mom" causes infinite loop, G. Branden Robinson, 2023/01/06
- [bug #63581] "nroff -mom sample_docs.mom" causes infinite loop, Gene, 2023/01/06
- [bug #63581] "nroff -mom sample_docs.mom" causes infinite loop, Deri James, 2023/01/06
- [bug #63581] "nroff -mom sample_docs.mom" causes infinite loop,
Dave <=
- [bug #63581] "nroff -mom sample_docs.mom" causes infinite loop, Gene, 2023/01/07
- [bug #63581] "nroff -mom sample_docs.mom" causes infinite loop, Peter Schaffter, 2023/01/14
- [bug #63581] "nroff -mom sample_docs.mom" causes infinite loop, G. Branden Robinson, 2023/01/14
- [bug #63581] "nroff -mom sample_docs.mom" causes infinite loop, Peter Schaffter, 2023/01/16
- [bug #63581] "nroff -mom sample_docs.mom" causes infinite loop, G. Branden Robinson, 2023/01/16