From: Ralph Amissah <ralph.amissah@...>
Date: 2005-09-25T04:58:16+09:00
Subject: segmentation fault on require 'yaml'

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Status: Open
Resolution: None
Priority: #
Summary: [BUG] segfault on ruby 1.8.3 (2005-09-21) [i486-linux] (isolated a=
s
related to require 'yaml')

sisu/ruby segfaults
running
ruby 1.8.3 (2005-09-21) [i486-linux]

require 'yaml'
causes segmentation fault.

I have managed to isolate it and produce non-segmenting versions of the
same program.

Apologies in advance, what i have to submit are a few thousand lines of
code,
and one line that causes the segfault, apparently even when not used by the
rest of the code.

Current versions of sisu segfault:
http://www.jus.uio.no/sisu/SiSU/download
http://www.jus.uio.no/sisu/SiSU/download#source
http://www.jus.uio.no/sisu/SiSU/download#debian
(debian is the easiest way currently to install sisu)
http://packages.qa.debian.org/s/sisu.html
http://www.jus.uio.no/sisu/SiSU/changelog

Narrowing the problem a little, here is some code that does not segfault:

http://www.jus.uio.no/sisu/debug/
it contains a (newer) version of the code for sisu
with use of yaml commented out.

to cause segfault, uncomment line 56 (require 'yaml') in file:
lib/sisu/0.26/sysenv.rb

segfault also occurs if
require 'yaml' is moved earlier in processing
e.g. to bin/sisu
and occurs on require 'yaml' regardless of whether yaml
is acutally used for anything.

segfault has been repeated on multiple installs of ruby
(same version) and more than one machine.

On SiSU
http://www.jus.uio.no/sisu

to run sisu, some sample files are provided in
data/sisu-examples/sample/document_samples_sisu_markup/
usually mapped to
/usr/share/sisu-examples/sample/document_samples_sisu_markup/

cd to directory
sisu -hv gpl2.fsf.s3
(there are several other possible command flags see man pages)

SiSU is written in Ruby. There are no extensions,
though external applications are used when their
functionality is needed, and for these it needs a
Unix/Gnu/Linux environment.
YAML is used to get optional user configuration and sisu version.

(debian is the easiest way to install sisu as sisu
calls on external applications where needed e.g.
to convert latex to pdf, and where a database such
as sqlite or postgresql is to be used... however
for it's basic function, plaintext, html, latex,
xml output, external applications are not required)

sisu has worked in ruby since 2000.

Ralph Amissah

PS thx mfp & Ari

--
email: ralph@amissah.com
.: ralph.amissah@gmail.com
SiSU: http://www.jus.uio.no/sisu

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