* you are sure the bug is caused by BuildCraft and not by any other mod,
* you have at least one of the following:
* a crash report,
* means of reproducing the bug in question,
* screenshots/videos/etc. to demonstrate the bug.
**If you are not sure if a bug report is valid, please use the "Ask Help!" subforum.**
Please check if the bug has been reported beforehand. Also, provide the version of BuildCraft used - if it's a version compiled from source, link to the commit/tree you complied from.
Please mention if you are using MCPC+, Cauldron, OptiFine, FastCraft or any other mods which optimize or otherwise severely modify the functioning of the Minecraft engine. That is very helpful when trying to reproduce a bug.
Please do not open issues for features unless you are a member of the BuildCraft team. For that, use the "Feature Requests" subforum.
BuildCraft, being an open-source project, gives you the right to submit a pull request if a particular fix or feature is important to you. However, if the change in question is major, please contact the team beforehand - we wish to prevent wasted effort.
features or change existing behaviour or balance, please discuss it on the feature ideas board before (http://mod-buildcraft.com/forums/index.php?board=4.0 before).
Do not submit pull requests which solely "fix" formatting. As these kinds of changes are usually very intrusive in commit history and everyone has their own idea what "proper formatting" is, they should be done by one of the main contributors.
Please only submit "code cleanup", if the changes actually have a substantial impact on readability.
PR implementing new features or changing large portions of code are helpful. But if you're doing such a change and if it gets accepted, please don't "fire and forget". Complex changes are introducing bugs, and as thourough as testing and peer review may be, there will be bugs. Please carry on playing your changes after initial commit and fix residual issues. It is extremely frustrating for others to spend days fixing regressions introduced by unmaintained submissions.
1. Ensure that `Java` (found [here](http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html)), `Git` (found [here](http://git-scm.com/)) are installed correctly on your system.