Iris and Minecraft Version

All recent versions of Iris+Iris Sodium including:
Iris & Sodium @ latest 1.17 commit,
Starline 1.17 Sodium+Iris,
IMS212 merg9999 & Damage flashing branches

Minecraft @ 1.17

Are you running Sodium along with Iris?

Yes

Operating System

Windows 10, Arch Linux

What is your GPU?

RTX 2080ti

Java Version

GraalVM 16, GraalVM-ee 16, OpenJDK16

Reproduction Steps

• Use Iris+Sodium on 1.17.1
• install a large number of mods (in my case, something above ~115 jar files)
• Attempt to boot minecraft
• Crash

Crash Report file and latest.log

latest.log

Additional context

This does not happen on CaffeineMC/Sodium 0.3.0.
The number of mods and what can cause crashing when reaching the limit isn't very consistent in my testing, so I have next to no information regarding what is going on here.

Crashes only when running Iris alongside Iris-Shaders/sodium-fabric. When using Iris standalone, MC boots fine. Once again, this is exclusive to Iris-Shaders/sodium-fabric, and isn't present on CaffeineMC/Sodium 0.3.0 release.

This is caused by the Shader mixin from Sodium somehow applying after Iris's, when Mixin should be skipping due to a redirect conflict. The exact cause is unknown, but removing the Shader mixin or otherwise disabling it from the Sodium fork will fix this.

A fix for an issue that we don't know why needs fixing in the first place isn't much of a fix. For all we know, the fix may be more of a bandaid than a permanent fix for the issue. Time will tell though, and something is better than nothing. We suspect it might be a bigger issue on fabric 1.17.1, maybe a mixin overflow, infinite loops cause by some kind of overflow somewhere, not sure. As it stands, any logs covering this issue are extremely inconsistent and don't make much sense. Might be worth bringing this issue to the attention of fabric devs.

Known reported bug, a fix is actively being worked on

It seems that removing the Sodium fork (and using Iris standalone) does not crash.

Still crashes when not using Not Enough Crashes

Does not crash on the latest CaffeineMC/Sodium-fabric compiled from source as of 7/23/2021, 6:40PM EST

latest.log

Crash with mixintrace.

also crashes w/o mod menu and slight gui improvements
latest.log

crash logs as well
crash-2021-07-23_18.44.31-client.txt
crash-2021-07-23_18.44.30-server.txt

This is caused by the Shader mixin from Sodium somehow applying after Iris's, when Mixin should be skipping due to a redirect conflict. The exact cause is unknown, but removing the Shader mixin or otherwise disabling it from the Sodium fork will fix this.

This was fixed by IrisShaders/sodium-fabric#25, which shipped in Iris 1.1.2.