Game crash: `Cannot invoke "class_5944.method_34583(String, Object)" because "$$2" is null`

A user on Reddit posted (https://www.reddit.com/r/fabricmc/comments/12ix9fb/my_modpack_crashing_1194) that their modpack is crashing (https://pastebin.com/7nCCq4yc). Based on the class that caused the crash my guess was that it was Iris. I've attached an image of the deobfuscated class that failed.
reddit
r/fabricmc - My Modpack Crashing (1.19.4)
2 votes and 1 comment so far on Reddit
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3 Replies
theRookieCoder
theRookieCoder16mo ago
The user seems to be using Iris 1.6 with ComplementaryShaders_v4.5.zip on HIGH +0 options changed by user (from the crash report)
Mithos
Mithos16mo ago
Yeah, there's currently something weird going on between Iris 1.6 and spectrum/owo-lib. I wanted to look into it a few days ago and file bug reports but forgot. As a side note, if you're not the person with the problem we'd rather ask you to direct them here instead of having to communicate over a middle-man I'm actually unable to reproduce it with sodium, iris and owo. Not sure what's going on, but I don't think it has to do with iris after all here's a link to the older thread with a similar issue if you want to compare modlists to try and find a culprit https://discord.com/channels/774352792659820594/1093803324844822548/1093803324844822548
theRookieCoder
theRookieCoder16mo ago
Sure! I'll keep in mind next time