URL:
<http://gna.org/bugs/?20385>
Summary: Using subnamespaces with [set_global_variable]
causes invalid memory access
Project: Battle for Wesnoth
Submitted by: shadowmaster
Submitted on: Mon 24 Dec 2012 06:09:57 PM CLST
Category: Bug
Severity: 5 - Blocker
Priority: 5 - Normal
Item Group: None of the others
Status: None
Privacy: Public
Assigned to: None
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Release: 1.10.x, 1.11.x
Operating System: Linux, Mac OS X
_______________________________________________________
Details:
Using subnamespaces like "Namespace.Subnamespace" with the
[set_global_variable] WML action (http://wiki.wesnoth.org/PersistenceWML)
causes a series of invalid memory access operations that may result in a
segmentation fault either immediately, or after a while (even when running
unrelated code).
I had first spotted this issue in my add-on After the Storm on Linux, and
vultraz confirmed that the issue also affects Mac OS X. The only known
workaround (which I have been using since then) is to not use real
subnamespaces, e.g. by replacing the above with "Namespace_Subnamespace". This
issue affects current 1.10.x versions, as well as 1.11.x/trunk.
I have published a single-file add-on with the minimum code necessary to
trigger the issue on a Wesnoth-UMC-Dev branch:
http://wesnoth-umc-dev.svn.sourceforge.net/viewvc/wesnoth-umc-dev/branches/testing/trunk/PersistenceWML_Memcheck_Test_Case/
Click on "Download GNU Tarball" after the file listing on that page to
download the add-on. The instructions and triggering WML can be found inside
the _main.cfg file.
I have run this code with a debug build on Valgrind and encountered a flood of
invalid memory access warnings after the point at which the
[set_global_variable] action is executed. The triggering code is in fact the
PersistenceWML implementation, but it is too dense for me to try to find the
cause.
I have attached the relevant portion of the Valgrind output to this bug
report.
_______________________________________________________
File Attachments:
-------------------------------------------------------
Date: Mon 24 Dec 2012 06:09:57 PM CLST Name:
persistencewml_memcheck_portion.log.gz Size: 5kB By: shadowmaster
<http://gna.org/bugs/download.php?file_id=16870>
_______________________________________________________
Reply to this item at:
<http://gna.org/bugs/?20385>
_______________________________________________
Message sent via/by Gna!
http://gna.org/
_______________________________________________
Wesnoth-bugs mailing list
[email protected]
https://mail.gna.org/listinfo/wesnoth-bugs
