Debian Bug report logs - #871225
Man.pm: False point size changes

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Bjarni Ingi Gislason <bjarniig@rhi.hi.is>

To: Debian Bug Tracking System <submit@bugs.debian.org>

Subject: Man.pm: False point size changes

Date: Mon, 7 Aug 2017 01:37:15 +0000

Package: perl-modules-5.26
Version: 5.26.0-5
Severity: minor
Tags: patch

Dear Maintainer,

   * What led up to the situation?

"man gcc" with

MAN_KEEP_STDERR=yes
MANOPT=--encoding=latin1 --no-hyphenation --warnings=w --no-justification
MANWIDTH=80

   * What was the outcome of this action?

<standard input>:3310: warning: \s escape results in non-positive point size; set to 1
<standard input>:3311: warning: \s escape results in non-positive point size; set to 1
<standard input>:25: backtrace: string `C+'
<standard input>:3311: warning: \s escape results in non-positive point size; set to 1
<standard input>:3320: warning: \s escape results in non-positive point size; set to 1
<standard input>:3323: warning: \s escape results in non-positive point size; set to 1
<standard input>:3326: warning: \s escape results in non-positive point size; set to 1
<standard input>:3331: warning: \s escape results in non-positive point size; set to 1
<standard input>:3333: warning: \s escape results in non-positive point size; set to 1
<standard input>:3333: warning: \s escape results in non-positive point size; set to 1
<standard input>:3336: warning: \s escape results in non-positive point size; set to 1
<standard input>:3337: warning: \s escape results in non-positive point size; set to 1
<standard input>:4668: warning: \s escape results in non-positive point size; set to 1
<standard input>:25: backtrace: string `C+'
<standard input>:4668: warning: \s escape results in non-positive point size; set to 1
<standard input>:4670: backtrace
/home/bg/git/groff/tmac/an-old.tmac:493: backtrace: macro `IP'
<standard input>:4670: warning: \s escape results in non-positive point size; set to 1
<standard input>:4670: backtrace
/home/bg/git/groff/tmac/an-old.tmac:493: backtrace: macro `IP'
<standard input>:4670: warning: \s escape results in non-positive point size; set to 1
<standard input>:9001: warning [p 93, 4.5i]: can't break line
<standard input>:9023: warning [p 93, 8.2i]: can't break line
<standard input>:9234: warning [p 95, 7.3i]: can't break line

   * What outcome did you expect instead?

  No warnings

  The escape '\s0' does not get the right former size if another '\s0' comes
after it (like '\s-1...\s-2...\s0...\s0').

  The string '\*(C+' gets resized in the manual for "gcc" in some lines.
  Each use of this string gets the previous size smaller, the warning is not
issued until the size is down to less than 1 point.

Patch:

--- Man.pm	2017-07-30 16:15:47.000000000 +0000
+++ Man.pm.new	2017-08-07 00:03:59.000000000 +0000
@@ -527,7 +527,7 @@ sub guesswork {
             ( [A-Z] [A-Z] (?: \s? [/A-Z+:\d_\$&] | \\- | \s? [.,\"] )* )  # (2)
             (?= [\s>\}\]\(\)\'\".?!,;] | \\*\(-- | \\[ ] | $ )            # (3)
         } {
-            $1 . '\s-1' . $2 . '\s0'
+            $1 . '\s-1' . $2 . '\s+1'
         }egx;
     }
 
@@ -1521,7 +1521,7 @@ sub preamble_template {
 .\" therefore won't be available.  \*(C` and \*(C' expand to `' in nroff,
 .\" nothing in troff, for use with C<>.
 .tr \(*W-
-.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p'
+.ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s+2\v'.1v'\h'-1p'
 .ie n \{\
 .    ds -- \(*W-
 .    ds PI pi

-- System Information:
Debian Release: buster/sid
  APT prefers proposed-updates
  APT policy: (500, 'proposed-updates'), (500, 'testing'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 4.9.30-2u2 (SMP w/2 CPU cores)
Locale: LANG=is_IS.iso88591, LC_CTYPE=is_IS.iso88591 (charmap=ISO-8859-1), LANGUAGE=is_IS.iso88591 (charmap=ISO-8859-1)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)

Versions of packages perl-modules-5.26 depends on:
ii  dpkg       1.18.24
ii  perl-base  5.26.0-5

Versions of packages perl-modules-5.26 recommends:
ii  perl  5.26.0-5

perl-modules-5.26 suggests no packages.

-- no debconf information

-- 
Bjarni I. Gislason

Message #16 received at 871225@bugs.debian.org (full text, mbox, reply):

From: Russ Allbery <rra@debian.org>

To: Bjarni Ingi Gislason <bjarniig@rhi.hi.is>

Cc: 871225@bugs.debian.org

Subject: Re: Bug#871225: Man.pm: False point size changes

Date: Sat, 26 Nov 2022 09:34:15 -0800

Bjarni Ingi Gislason <bjarniig@rhi.hi.is> writes:

> "man gcc" with

> MAN_KEEP_STDERR=yes
> MANOPT=--encoding=latin1 --no-hyphenation --warnings=w --no-justification
> MANWIDTH=80

>    * What was the outcome of this action?

> <standard input>:3310: warning: \s escape results in non-positive point size; set to 1
> <standard input>:3311: warning: \s escape results in non-positive point size; set to 1
> <standard input>:25: backtrace: string `C+'
[...]

The code that caused these bugs was from minor formatting adjustments
visible only in troff output (and, at least in my opinion, somewhat
dubious).  That code has also been a constant source of bugs and weird
issues for years.

In podlators 5.00, released yesterday, I dropped nearly all of the
troff-only guesswork on the grounds that the minor improvements in
formatting for an output format almost no one uses weren't worth the
maintenance burden.  (I suspect that anyone who wants to print Perl
documentation these days would be better-served by using the rendered
output of one of the excellent POD to HTML converters.)

This bug can therefore be closed once podlators 5.00 is incorporated into
the Perl packages in Debian.  That may still be a bit, since I'm not sure
if it will be pulled into a point release or only the next major release
of Perl.

-- 
Russ Allbery (rra@debian.org)              <https://www.eyrie.org/~eagle/>

Message #21 received at 871225-close@bugs.debian.org (full text, mbox, reply):

From: Debian FTP Masters <ftpmaster@ftp-master.debian.org>

To: 871225-close@bugs.debian.org

Subject: Bug#871225: fixed in perl 5.38.0~rc2-1

Date: Tue, 04 Jul 2023 18:00:25 +0000

Source: perl
Source-Version: 5.38.0~rc2-1
Done: Niko Tyni <ntyni@debian.org>

We believe that the bug you reported is fixed in the latest version of
perl, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 871225@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Niko Tyni <ntyni@debian.org> (supplier of updated perl package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)


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Hash: SHA256

Format: 1.8
Date: Sun, 02 Jul 2023 13:12:07 +0300
Binary: libperl5.38 libperl-dev perl perl-base perl-debug perl-doc perl-modules-5.38
Source: perl
Architecture: all amd64 source
Version: 5.38.0~rc2-1
Distribution: experimental
Urgency: medium
Maintainer: Niko Tyni <ntyni@debian.org>
Changed-By: Niko Tyni <ntyni@debian.org>
Closes: 871225 941980 944883 954089 1006280 1020574 1021955 1029753 1033649 1035109
Description: 
 libperl5.38 - shared Perl library
 libperl-dev - Perl library: development files
 perl-base  - minimal Perl system
 perl-debug - debug-enabled Perl interpreter
 perl-doc   - Perl documentation
 perl       - Larry Wall's Practical Extraction and Report Language
 perl-modules-5.38 - Core Perl modules
Changes:
 perl (5.38.0~rc2-1) experimental; urgency=medium
 .
   * Update to new upstream release candidate 5.38.0-RC2.
     + [SECURITY] CVE-2023-31484: CPAN.pm now verifies TLS certificates.
                                  (Closes: #1035109)
     + [SECURITY] CVE-2023-31486: HTTP-Tiny now verifies TLS certificates
                                  by default.  (Closes: #954089)
     + no longer panics on s///gre with tainted utf8 strings.
       (Closes: #1006280)
     + fixes a syntax error in Math::Complex documentation.
       (Closes: #944883)
     + improves perlretut formatting.(Closes: #1033649)
     + POD with italics inside C<> now gets correctly formatted.
       (Closes: #1021955)
     + zero-width space in POD is now converted correctly.
       (Closes: #941980)
     + converted POD no longer causes point size warnings from troff
       specific heuristics. (Closes: #871225)
     + Pod::Text now does output encoding correctly. (Closes: #1020574)
   * Add build dependency on libcrypt-dev. (Closes: #1029753)
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