Issue Description:

This issue happens when adding the new Jenkins builds to the SevTech pack to test new features.

What happens:

Various classes fail to load, causing the game to crash.

What you expected to happen:

The game to not crash due to failed classes in CrT.

Script used (Please Pastebin or gist your script, posting an unpasted or ungist'd script will automatically close this issue):

Issue is unrelated to scripts. It happens before all mods are constructed.

Minetweaker.log file (Please Pastebin or gist your file, posting an unpasted or ungist'd file will automatically close this issue):

No Minetweaker.log is generated. You should probably change this to say Crafttweaker.log by the way.

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Affected Versions (Do not use "latest"):

• Minecraft: 1.12.2
• Forge: 14.23.2.2619, older versions too.
• Crafttweaker: 4.1.4.429 and 4.1.4.430

Your most recent log file where the issue was present:

There are two log files. Since different classes are missing, possible race condition.

https://gist.github.com/darkhax/aa32381a186d609182cb6476c87c0e51