I updated from 1.0.2 to 1.0.3 and now my world loading is stuck

works on 1.0.2
latest.log

looks to be null pointer exception.

P.s This is on world creation after 100%

Having the same issue, Can't figure out what is causing it.

Update iris to 1.2.3.

I'm having the same issue here.
While trying to solve IrisShaders/Iris#1383
I was able to figure out what was causing the framerate drops but I wasn't able to figure out why Minecraft was still not fully loading into any worlds. I then later found out that indium 1.0.3 was causing the worlds not to load properly. Removing the mod fixed the issue.

My latest.log file
https://gist.github.com/zndrmn/8cd2d8008ced72a6378dd386f4e80e0c#file-latest-log

Iris is updated to the latest version for me

These are most likely different crashes, from different mods. The original poster here is using an outdated version of Iris; if you're still experiencing crashes with the latest version of Iris please make a separate issue with your crash log.

@zndrmn Mixin apply for mod physicsmod failed physicsmod.mixins.json:vines.MixinIndiumTerrainRenderContext Your issue is being caused by Physics Mod, see haubna/PhysicsMod#330