I loaded up a world and it crashed

Incomplete without a crash report. If the issue continues with the map you have provided, then its best to contact the creator of the map.

Incomplete without a crash report from ([minecraft/crash-reports/crash-<DATE>-client.txt|http://hopper.minecraft.net/help/finding-minecraft-data-folder]). Please attach it so that we can diagnose your issue.

Anyway, cannot reproduce with the attached world, see screenshot.