Immersiveengineering: [1.10.2][0.10-42] Railcraft and IE Shaders Crash

[Ristellise]

Crashed When a Railcraft Steam locomotive is launched from a Holding Track. Crashes due to cart shaders from IE.

using The latest Version of the mods:
IE: ImmersiveEngineering-0.10-42
However Railcraft is build directly from source:
Railcraft_1.10.2-10.0.0-alpha-25-unofficial
No optifine was used.Happened on SP. not tested with dedicated server or LAN.Assuming the same will happen.

Crashlog:
https://gist.github.com/Joshwoo70/3994b0f1b24b6d1bc10099326677d619
Notes From CJ:

[BluSunrize]

Ugh. Yes. Because using an unreleased mod is definitely a great idea >_>
I'll look into it.

[BluSunrize]

So, I can't get Railcraft to load in my dev environment. Probably an issue with obfuscation or some bullplop.

Back to the issue at hand however:
As far as I am aware, I'm not doing anything wrong. IE's attachment of capability looks like this:
event.addCapability(new ResourceLocation("immersiveengineering:shader"), new CapabilityHandler_CartShaders(entityMinecart));
see here:
https://github.com/BluSunrize/ImmersiveEngineering/blob/master/src/main/java/blusunrize/immersiveengineering/common/EventHandler.java#L121-L129

I'd actually like @CovertJaguar 's direct input on this. To my knowledge, everything should work as intended, yet somehow the capability map seems to get scrambled. Any ideas?

[BluSunrize]

Right. After a very short conversation in the FC channels, it seems that I didn't initialize and register my capability.
I'll attempt to confirm that to be the fix as soon as I can get Railcraft to not crash on rendering items. Still working on that one. Gimme a few hours.

[BluSunrize]

@Joshwoo70 if you can build from sources, do the favour and build yourself an IE after that commit ^

You'll need Crafttweaker as an additional Lib because they don't have maven, so they're not included in the gradle.
I actually can't test atm because Lambdas apparently don't deobf properly which prevents me from using RC in dev.

Without any further input, it'll probably stay with this fix.

[malte0811]

The fix does not appear to be working, I'll try to fix it now.

[KnightMiner]

Could this line be the issue? I'm pretty sure you should be injecting the capability as @CapabilityInject(CapabilityHandler_CartShaders.class), meaning you never add a value to your capability constant thus are actually checking for an input of null as to whether to return your capability.

[malte0811]

I know, I just fixed it :). This is an interaction of an RC bug and and IE bug:
IE does not have the correct @CapabilityInject, so the shader capability is null.
RC does not call its capability registration method (mods.railcraft.common.blocks.charge.CapabilityCartBattery.register()), so their capability is null as well (@CovertJaguar, you might want to fix that).
And this causes the IE capability to be returned when the RC one is requested and therefore causes the crash.

[BluSunrize]

Ugh, fine then. Gimme a pull request, I want to get a build out today.

[CovertJaguar]

Hmm....register? oh dear