After the upgrade from ruby 2.3 to 2.5, /usr/sbin/dhelp_parse fails:


# sh -x /etc/cron.weekly/dhelp
+ '[' -d /var/lib/dhelp ']'
+ '[' -x /usr/sbin/dhelp_parse ']'
+ '[' -x /usr/bin/index++ ']'
+ rm --force /var/lib/dhelp/documents.index
+ /usr/sbin/dhelp_parse -r
Traceback (most recent call last):
	5: from /usr/sbin/dhelp_parse:32:in `<main>'
	4: from /usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'
	3: from /usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'
	2: from /usr/lib/ruby/vendor_ruby/dhelp.rb:21:in `<top (required)>'
	1: from /usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'
/usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require': cannot load such file -- dbm (LoadError)
+ /usr/sbin/dhelp_parse -i
Traceback (most recent call last):
	5: from /usr/sbin/dhelp_parse:32:in `<main>'
	4: from /usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'
	3: from /usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'
	2: from /usr/lib/ruby/vendor_ruby/dhelp.rb:21:in `<top (required)>'
	1: from /usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require'
/usr/lib/ruby/2.5.0/rubygems/core_ext/kernel_require.rb:59:in `require': cannot load such file -- dbm (LoadError)



Cheers,
gregor



- -- System Information:
Debian Release: buster/sid
  APT prefers unstable
  APT policy: (990, 'unstable'), (500, 'unstable-debug'), (500, 'oldoldstable'), (500, 'experimental'), (500, 'testing'), (500, 'stable'), (500, 'oldstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.15.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=C, LC_CTYPE=de_AT.utf8 (charmap=UTF-8), LANGUAGE=C (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Init: sysvinit (via /sbin/init)
LSM: AppArmor: enabled

Versions of packages dhelp depends on:
ii  doc-base                0.10.8
ii  libcgi-pm-perl          4.38-1
ii  libdata-page-perl       2.02-1
ii  libhtml-parser-perl     3.72-3+b2
ii  liblocale-gettext-perl  1.07-3+b3
ii  libtemplate-perl        2.24-1.2+b5
ii  liburi-perl             1.73-1
ii  perl                    5.26.1-5
ii  poppler-utils           0.62.0-2
ii  pstotext                1.9-6+b2
ii  ruby                    1:2.5.0
ii  ruby-debian             0.3.9+b7
ii  ruby-gettext            3.2.4-1
ii  swish++                 6.1.5-5
ii  ucf                     3.0038

dhelp recommends no packages.

Versions of packages dhelp suggests:
pn  catdvi                  <none>
ii  chromium [www-browser]  64.0.3282.119-2+b2
ii  elinks [www-browser]    0.12~pre6-13
ii  firefox [www-browser]   58.0.1-1+b1
ii  html2text               1.3.2a-21
pn  httpd-cgi               <none>
pn  info2www                <none>
ii  lynx [www-browser]      2.8.9dev16-3
pn  man2html                <none>
ii  w3m [www-browser]       0.5.3-36

- -- no debconf information
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iQKTBAEBCgB9FiEE0eExbpOnYKgQTYX6uzpoAYZJqgYFAlqj3qpfFIAAAAAALgAo
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-----END PGP SIGNATURE-----

Unfortunately, I can't reproduce this error. However, I've faced the
other error related to dhelp's cron script. It fails to build a document
index, and so search doesn't work. But at least the dhelp_parse utility
can rebuild its documentation directory, and a home page is still
available. It seems some of the next warnings aren't linked to dhelp.

But these issues are already reported, see Bug#803342 and Bug#889651.

(dhelp)root@barberry:/# sh -x /etc/cron.weekly/dhelp
+ [ -d /var/lib/dhelp ]
+ [ -x /usr/sbin/dhelp_parse ]
+ [ -x /usr/bin/index++ ]
+ rm --force /var/lib/dhelp/documents.index
+ /usr/sbin/dhelp_parse -r
/usr/lib/ruby/vendor_ruby/debian.rb:223: warning: parentheses after
method name is interpreted as an argument list, not a decomposed argument
/usr/lib/ruby/vendor_ruby/debian.rb:224: warning: parentheses after
method name is interpreted as an argument list, not a decomposed argument
/usr/lib/ruby/vendor_ruby/debian.rb:227: warning: parentheses after
method name is interpreted as an argument list, not a decomposed argument
/usr/lib/ruby/vendor_ruby/debian.rb:230: warning: parentheses after
method name is interpreted as an argument list, not a decomposed argument
/usr/lib/ruby/vendor_ruby/debian.rb:233: warning: parentheses after
method name is interpreted as an argument list, not a decomposed argument
/usr/lib/ruby/vendor_ruby/debian.rb:236: warning: parentheses after
method name is interpreted as an argument list, not a decomposed argument
/usr/lib/ruby/vendor_ruby/debian.rb:348: warning: parentheses after
method name is interpreted as an argument list, not a decomposed argument
/usr/lib/ruby/vendor_ruby/debian.rb:557: warning: parentheses after
method name is interpreted as an argument list, not a decomposed argument
/usr/lib/ruby/vendor_ruby/debian.rb:577: warning: parentheses after
method name is interpreted as an argument list, not a decomposed argument
/usr/lib/ruby/vendor_ruby/debian.rb:578: warning: parentheses after
method name is interpreted as an argument list, not a decomposed argument
/usr/lib/ruby/vendor_ruby/debian.rb:743: warning: parentheses after
method name is interpreted as an argument list, not a decomposed argument
/usr/lib/ruby/vendor_ruby/debian.rb:753: warning: parentheses after
method name is interpreted as an argument list, not a decomposed argument
/usr/lib/ruby/vendor_ruby/debian.rb:763: warning: parentheses after
method name is interpreted as an argument list, not a decomposed argument
/usr/lib/ruby/vendor_ruby/debian.rb:772: warning: parentheses after
method name is interpreted as an argument list, not a decomposed argument
/usr/lib/ruby/vendor_ruby/debian.rb:799: warning: parentheses after
method name is interpreted as an argument list, not a decomposed argument
/usr/lib/ruby/vendor_ruby/debian.rb:1004: warning: parentheses after
method name is interpreted as an argument list, not a decomposed argument
+ /usr/sbin/dhelp_parse -i
/usr/lib/ruby/vendor_ruby/debian.rb:223: warning: parentheses after
method name is interpreted as an argument list, not a decomposed argument
/usr/lib/ruby/vendor_ruby/debian.rb:224: warning: parentheses after
method name is interpreted as an argument list, not a decomposed argument
/usr/lib/ruby/vendor_ruby/debian.rb:227: warning: parentheses after
method name is interpreted as an argument list, not a decomposed argument
/usr/lib/ruby/vendor_ruby/debian.rb:230: warning: parentheses after
method name is interpreted as an argument list, not a decomposed argument
/usr/lib/ruby/vendor_ruby/debian.rb:233: warning: parentheses after
method name is interpreted as an argument list, not a decomposed argument
/usr/lib/ruby/vendor_ruby/debian.rb:236: warning: parentheses after
method name is interpreted as an argument list, not a decomposed argument
/usr/lib/ruby/vendor_ruby/debian.rb:348: warning: parentheses after
method name is interpreted as an argument list, not a decomposed argument
/usr/lib/ruby/vendor_ruby/debian.rb:557: warning: parentheses after
method name is interpreted as an argument list, not a decomposed argument
/usr/lib/ruby/vendor_ruby/debian.rb:577: warning: parentheses after
method name is interpreted as an argument list, not a decomposed argument
/usr/lib/ruby/vendor_ruby/debian.rb:578: warning: parentheses after
method name is interpreted as an argument list, not a decomposed argument
/usr/lib/ruby/vendor_ruby/debian.rb:743: warning: parentheses after
method name is interpreted as an argument list, not a decomposed argument
/usr/lib/ruby/vendor_ruby/debian.rb:753: warning: parentheses after
method name is interpreted as an argument list, not a decomposed argument
/usr/lib/ruby/vendor_ruby/debian.rb:763: warning: parentheses after
method name is interpreted as an argument list, not a decomposed argument
/usr/lib/ruby/vendor_ruby/debian.rb:772: warning: parentheses after
method name is interpreted as an argument list, not a decomposed argument
/usr/lib/ruby/vendor_ruby/debian.rb:799: warning: parentheses after
method name is interpreted as an argument list, not a decomposed argument
/usr/lib/ruby/vendor_ruby/debian.rb:1004: warning: parentheses after
method name is interpreted as an argument list, not a decomposed argument
terminate called after throwing an instance of 'std::out_of_range'
  what():  basic_string::erase: __pos (which is 18446744073709551615) >
this->size() (which is 8)
Dhelp::IndexerError: Couldn't index
/usr/share/doc/base-passwd/users-and-groups.html
, /usr/share/doc/base-passwd/users-and-groups.html
, /usr/share/doc/base-passwd/users-and-groups.txt.gz
, /usr/share/doc/man-db/man-db-manual.ps.gz
, /usr/share/doc/man-db/man-db-manual.txt.gz
, /usr/share/doc/doc-base/doc-base.html/about.html
, /usr/share/doc/doc-base/doc-base.html/index.html
, /usr/share/doc/doc-base/doc-base.html/informations.html
, /usr/share/doc/doc-base/doc-base.html/interface.html
, /usr/share/doc/doc-base/doc-base.html/todo.html
, /usr/share/doc/doc-base/doc-base.html/index.html
, /usr/share/doc/doc-base/doc-base.txt.gz
, /usr/share/doc/nano/faq.html
, /usr/share/doc/nano/faq.html
, /usr/share/doc/doc-base/install-docs.html
, /usr/share/doc/doc-base/install-docs.html
, /usr/share/doc/libpng16-16/libpng-manual.txt.gz
, /usr/share/doc/po-debconf/manpages.vi/debconf-gettextize.1.html
, /usr/share/doc/po-debconf/manpages.vi/debconf-updatepo.1.html
, /usr/share/doc/po-debconf/manpages.vi/po-debconf.7.html
, /usr/share/doc/po-debconf/manpages.vi/po2debconf.1.html
, /usr/share/doc/po-debconf/manpages.vi/podebconf-display-po.1.html
, /usr/share/doc/po-debconf/manpages.vi/podebconf-report-po.1.html
 using /usr/bin/index++ --config-file
/usr/share/dhelp/config/swish++.conf --index-file
/var/lib/dhelp/documents.index --follow-links -
(/usr/lib/ruby/vendor_ruby/dhelp.rb:616:in `index'
/usr/sbin/dhelp_parse:171:in `do_deferred_indexing'
/usr/sbin/dhelp_parse:205:in `main'
/usr/sbin/dhelp_parse:221:in `<main>')
(dhelp)root@barberry:/#

tags 892548 - unreproducible
reassign 892548 libruby2.5
forcemerge 892099 892548
stop

It appears the bug with very similar issue was fixed in the libruby2.5
package so I merge these bugs. If your error still exists, let us know.

Indeed, I can confirm that "my" original output is gone, and I now
see what you've copied below.

Cheers,
gregor

Control: unmerge 892548
Control: reassign 892548 dhelp

From that output my evaluation is that dhelp has issues with ruby2.5,
even after the lack of dbm support has been fixed. I'm returning this
bug to dhelp.

I have librunby2.5, version 2.5.7-1. This is on testing updated most
days.

# /usr/sbin/dhelp_parse -i
index++: error: could not read index from
"/var/lib/dhelp/documents.index": No data available
Dhelp::IndexerError: Couldn't index  using /usr/bin/index++
--config-file /usr/share/dhelp/config/swish++.conf --index-file
/var/lib/dhelp/documents.index --follow-links --incremental -
(/usr/lib/ruby/vendor_ruby/dhelp.rb:616:in `index'
/usr/sbin/dhelp_parse:171:in `do_deferred_indexing'
/usr/sbin/dhelp_parse:205:in `main'
/usr/sbin/dhelp_parse:221:in `<main>')

Dear Maintainer,

*** Reporter, please consider answering these questions, where appropriate ***

   * What led up to the situation?

I just looked at my mail sent by cron which show me error messages each week.

When I tried the commands it seems the trouble comes from the
`/usr/sbin/dhelp_parse -i` call in `/etc/cron.weekly/dhelp`.

Here is the output when I try it on my box (full output is attached):

```
terminate called after throwing an instance of 'std::out_of_range'
  what():  basic_string::erase: __pos (which is 18446744073709551615) >
this->size() (which is 6)
Dhelp::IndexerError: Broken pipe indexing /usr/share/doc/git-
doc/technical/shallow.txt
, /usr/share/doc/weechat-doc/html/weechat_quickstart.es.html
, /usr/share/doc/weechat-doc/html/weechat_quickstart.es.html
, /usr/share/doc/bogofilter-common/bogotune-faq.html
, /usr/share/doc/bogofilter-common/bogotune-faq.html
[...] a lot of similar lines are cut here
, /usr/share/doc/exim4-base/README.Debian.html
, /usr/share/doc/exim4-base/README.Debian.html
, /usr/share/doc/ocl-icd-libopencl1/html/libOpenCL.html
, /usr/share/doc/ocl-icd-libopencl1/html/libOpenCL.html
, /usr/share/doc/bogofilter-common/bogofilter-tuning.HOWTO.html
, /usr/share/doc/bogofilter-common/bogofilter-tuning.HOWTO.html
, using /usr/bin/index++ --config-file /usr/share/dhelp/config/swish++.conf
--index-file /var/lib/dhelp/documents.index --follow-links -
(/usr/lib/ruby/vendor_ruby/dhelp.rb:612:in `rescue in index'
/usr/lib/ruby/vendor_ruby/dhelp.rb:605:in `index'
/usr/sbin/dhelp_parse:171:in `do_deferred_indexing'
/usr/sbin/dhelp_parse:205:in `main'
/usr/sbin/dhelp_parse:221:in `<main>')
```

That command should not produce any errors.

Moreover I guess the cron script should not produce any output in case
everything is running fine so that no mail should be sent.

   * What exactly did you do (or not do) that was effective (or
     ineffective)?

Nothing I tried so far solve the problem.


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