Versions

Minecraft Forge 13.20.0.2282
Literal Ascension 1.11.2-1.0.1.1
Buildcraft 7.99.1

Crash Report:

crash-2017-05-02_10.42.56-server.txt

Related Literal Ascension Issue:

IllegalArgumentException crash with buildcraft 7.99.1 calling BlockDelegate.getPickBlock

Duplicate of #3536, already fixed.

@AlexIIL you might want to considder a hotfix release as i have a feeling we're only gona keep getting duplicate reports until the fix is released

But I'm not sure that current fix (44a3988) is better than my fix (7855814) because it probably can cause other Exceptions and other problems.

both fixes still have the potential to crash in different ways, the only way to make crashes impossible would be to wrap the thing in a try catch that catches absolutely everything

i do think that the current fix might be a bit better for performance as it doesn't involve constantly creating player objects that need to be cleaned up by the GC

My apologies for this duplicate of #3536
I searched issues titles only, but:
"Crash on dedicated server" lacks of explicity :)