Describe the bug

3.0.0-alpha.1 crashes on startup

Expected behavior

Not crashing

Observed/actual behavior

The game has crashed in my language, with exit code 0.

Steps To Reproduce

Install 3.0.0-alpha.1 via CurseForge launcher.
Run using Mojang Launcher.
Crash

Modpack version

3.0.0-alpha.1

Launcher

Curseforge Launcher

Install method

Fresh install/new profile

Additional context

There is no crash-report so I pasted latest.log:
https://pastebin.com/ezwiy6tR

Try launching it again, it fixed it for me and one other person. I do not yet know the cause of the issue.

I launched 3 times, the same error

Alright. Please try three dots -> Profile options -> Allow content management for this profile, click the ⬇️ next to Not Enough Crashes, and try relaunching with Play.

Released a second alpha, maybe it helps you. Got an another user reporting a similar issue in Discord, so I'll keep this open for now though.

Edit 2: several people claim that updating CF Launcher fixes this issue, any new person with the issue should try that first.

I found solution for me, it crashes because I have -Dmixin.debug=true argument, because I'm testing mixins in another modpacks. Without this arg the game not crashes (tested on alpha.2)

I didn't have -XX:PermSize=256m but I typed it specifically and the error is a little different:

and after close I see this (this is in polish language - exit code 0):

With -Dmixin.debug=true arg I only see error on second screen

I think enough people have updated their CF Launchers so this is not an issue anymore. Any new crashes should create a new issue.