
Modrinth · Minecraft mod
CrashPatch (Crash Preventer)
Stop crashes from closing your game! By Polyfrost, best with OneClient.
Quick answer
Which CrashPatch (Crash Preventer) release matches 1.8.9?
CrashPatch (Crash Preventer) v2.2.3 targets 1.8.9 with ornithe. It must be installed on the client. Do not install it on the dedicated server. 1 required mod needs a matching file.
Where it goes
Is CrashPatch (Crash Preventer) required on the client, server, or both?
It must be installed on the client. Do not install it on the dedicated server.
This file is marked client-only.
What else does CrashPatch (Crash Preventer) v2.2.3 need?
v2.2.3 on 1.8.9. Every mod below is checked against that same setup.
Install Fabric Language Kotlin, OneConfig, Compose Multiplatform, Ornithe Standard Libraries first, but 1 required mod has no matching file for this setup. Do not mix loader builds to force a match. 2 come through another mod in the chain.
2 extra mods were pulled in by other dependencies. Indented rows show who needs each one. We only count dependency files that match this setup. A file for another loader does not fill the gap.
Before you install it
Add CrashPatch (Crash Preventer) without breaking your instance.
Built for CrashPatch (Crash Preventer) v2.2.3 on 1.8.9. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use v2.2.3. It targets 1.8.9 with ornithe; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
Install Fabric Language Kotlin, OneConfig, Compose Multiplatform, Ornithe Standard Libraries first, but 1 required mod has no matching file for this setup. Do not mix loader builds to force a match. 2 come through another mod in the chain.
- 03
Put it on the correct side
It must be installed on the client. Do not install it on the dedicated server.
- 04
Pick the file you checked
Use the “Get this file” button beside v2.2.3. It opens that exact file at the source.
About this project
What does CrashPatch (Crash Preventer) add?
CrashPatch
CrashPatch stops a crash from closing your game. You get a screen that tells you which mod probably caused it and how to fix it, and most of the time you can just keep playing.

- See which mod is suspected
- Get known fixes for the crash
- Read the full crash log, copy it or upload it to hst.sh or mclo.gs (your session token is stripped out first)
- Go back to the game with one button


If the game crashes while it is still starting up there's nothing to go back to, but you still get the same screen with the cause and the fixes.
Other things it does:
- Disconnect screens show a fix when the reason is one CrashPatch knows
- Failed mixins and packet errors from before the crash are added to the report
/crashpatch crashcrashes the game on purpose (if you want to see the screen)- On 1.8.9, set how many crashes it takes before you are sent out of the world or the game is allowed to close
Supported versions
- Minecraft 1.8.9 on Ornithe.
- Minecraft 1.21.1-26.3 on Fabric.
CrashPatch needs OneConfig and Fabric Language Kotlin. The Fabric builds also need Not Enough Crashes.
Support
- Report bugs and ask questions on the Polyfrost Discord.
- Check Polyfrost Status if a Polyfrost service is down.
Project description from Modrinth.
Pick your setup
CrashPatch (Crash Preventer) by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
26.3
1 loader build26.2
1 loader build26.1.2
1 loader build26.1.1
1 loader build26.1
1 loader build1.21.11
1 loader build1.21.10
1 loader build1.21.8
1 loader build1.21.5
1 loader build1.21.4
1 loader build1.21.1
1 loader build1.8.9
1 loader buildCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
CrashPatch (Crash Preventer) versions and loaders
v2.2.3
CrashPatch-2.2.3+1.8.9.jar
30 Oct 2026
v2.2.2
CrashPatch-2.2.2+1.8.9.jar
26 Oct 2026
v2.2.1
CrashPatch-2.2.1+1.8.9.jar
14 Oct 2026
v2.2.0
CrashPatch-2.2.0+1.8.9.jar
2 Oct 2026
Looking for an older file? The official Modrinth project page is in Resources.