Version 4 (Paolo Cavallini, 12/27/2011 01:49 am)
h1. Bugreports - the redmine style
This page summarizes how to use redmine with QGIS and provides links to specific information about features and operating procedures.
You must have an OSGeo account and login in order to submit bug reports. To get started, first create an OSGeo account.
Once you have your account, use http://hub.qgis.org/projects/quantum-gis/issues to login and search if the issue you'd like to report is probably already entered.
Tickets are used to report bugs, request enhancements and submit patches. Redmine is more than a bug reporting system. Tickets can be associated with a QGIS Milestone, allowing you to see progress towards completion. Completion of a Milestone not only requires closing bugs, but completing other tasks related to a release such as documentation, web site updates, packaging, and announcements.
h2. Opening a Ticket
Before filing a bug, review the currently open issues to make sure that you aren't creating a duplicate. If you have additional information on an issue, you can add it to the ticket. Third party plugins might also cause problems. If you have installed any, you should also verify that the problem is still reproducible without them.
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To report a bug choose New Issue from the menu bar. Note: You can also request an enhancement or submit a patch using the Ticket system.
Important information needed when opening a ticket:
* Type - choose the ticket type from the drop-down list
** bug - bug
** feature - new feature request
Provide a full description of the problem including steps to repeat it
if you feel the bug could be related to a certain platform version or dependencies package version (GDAL, OGR, GEOS etc) include that as well.
if your QGIS crashes if might be useful to include a backtrace (see below)
Priority - provide an estimate of the severity of the problem
Component - Choose the aspect of the application that is most closely associated with the problem
Milestone - If this issue affects a particular Milestone in the project choose it from the drop-down list
Version of QGIS this issue affects
Platform - Choose the platform you are using
h2. Creating a backtrace
If you have a crash it might be useful to include a backtrace as the bug might be not reproducable on an other machine. On Unix you can create a backtrace using a core dump and gdb. A core dump is a memory dump of the state of the process when the crash happened.
Depending on you distribution the automatic creation of core dumps might be disabled. In that case you only see for instance Segmentation fault and not Segmentation fault (core dumped) in the shell you started QGIS from and you need to run ulimit -c unlimited before starting QGIS. You could also include that in your .profile.
Start qgis from the shell and repeat the steps to reproduce the crash. After the crash the core file will be located in the current directory.
To produce a backtrace from it you start gdb /path/to/the/qgis/binary core. The binary is usually /usr/bin/qgis or /usr/bin/qgis.bin on Debian with the GRASS plugin installed.
In gdb you run bt which will produce the backtrace.
Creating a patch
Assuming you have checked out your svn copy into a directory called 'qgis', create your patch from in the top level directory of the svn checkout e.g.
svn diff > patch_for_bug_33.txt
Note the naming convention - include the id of the bug you are fixing with your patch.
Closing a ticket
When committing a bug fix to the Subversion repository, refer to the bug number preceded by # as follows:
Fix for bug #31 using patch provided by Joe Bloggs
When closing the bug in trac refer to the Subversion version number of that commit:
This issue is fixed in r5051
If you follow this approach, your bug will be cross-linked in both ticket view and the source browsing view.