Stack Deobfuscator Mod (1.21, 1.20.1) allows mod developers to more easily identify issues in a non-development environment, as the errors are instantly human-readable. All errors displayed in the console and all crash reports will be remapped from unreadable production names (e.g. net.minecraft.class_310) to readable mapped names (e.g. net.minecraft.client.MinecraftClient).

Comparison:

Before

[23:13:08] [Render thread/ERROR]: Reported exception thrown!
net.minecraft.class_148: Manually triggered debug crash
at net.minecraft.class_309.method_1474(class_309.java:509) ~[client-intermediary.jar:?] at net.minecraft.class_310.method_1574(class_310.java:1955) ~[client-intermediary.jar:?] at net.minecraft.class_310.method_1523(class_310.java:1180) ~[client-intermediary.jar:?] at net.minecraft.class_310.method_1514(class_310.java:801) ~[client-intermediary.jar:?] at net.minecraft.client.main.Main.main(Main.java:237) ~[minecraft-1.19.4-client.jar:?] at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:462) ~[fabric-loader-0.14.18.jar:?] at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:74) ~[fabric-loader-0.14.18.jar:?] at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23) ~[fabric-loader-0.14.18.jar:?] at org.prismlauncher.launcher.impl.StandardLauncher.launch(StandardLauncher.java:88) ~[NewLaunch.jar:?] at org.prismlauncher.EntryPoint.listen(EntryPoint.java:126) ~[NewLaunch.jar:?] at org.prismlauncher.EntryPoint.main(EntryPoint.java:71) ~[NewLaunch.jar:?] Caused by: java.lang.Throwable: Manually triggered debug crash
at net.minecraft.class_309.method_1474(class_309.java:506) ~[client-intermediary.jar:?] ... 10 more

After (yarn/quilt mappings):

[23:11:25] [Render thread/ERROR]: Reported exception thrown!
net.minecraft.util.crash.CrashException: Manually triggered debug crash
at net.minecraft.client.Keyboard.pollDebugCrash(Keyboard.java:509) ~[client-intermediary.jar:?] at net.minecraft.client.MinecraftClient.tick(MinecraftClient.java:1955) ~[client-intermediary.jar:?] at net.minecraft.client.MinecraftClient.render(MinecraftClient.java:1180) ~[client-intermediary.jar:?] at net.minecraft.client.MinecraftClient.run(MinecraftClient.java:801) ~[client-intermediary.jar:?] at net.minecraft.client.main.Main.main(Main.java:237) ~[minecraft-1.19.4-client.jar:?] at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:462) ~[fabric-loader-0.14.18.jar:?] at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:74) ~[fabric-loader-0.14.18.jar:?] at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23) ~[fabric-loader-0.14.18.jar:?] at org.prismlauncher.launcher.impl.StandardLauncher.launch(StandardLauncher.java:88) ~[NewLaunch.jar:?] at org.prismlauncher.EntryPoint.listen(EntryPoint.java:126) ~[NewLaunch.jar:?] at org.prismlauncher.EntryPoint.main(EntryPoint.java:71) ~[NewLaunch.jar:?] Caused by: java.lang.Throwable: Manually triggered debug crash
at net.minecraft.client.Keyboard.pollDebugCrash(Keyboard.java:506) ~[client-intermediary.jar:?] ... 10 more

After (mojang mappings):

[23:04:12] [Render thread/ERROR]: Reported exception thrown!
net.minecraft.ReportedException: Manually triggered debug crash
at net.minecraft.client.KeyboardHandler.tick(KeyboardHandler.java:509) ~[client-intermediary.jar:?] at net.minecraft.client.Minecraft.tick(Minecraft.java:1955) ~[client-intermediary.jar:?] at net.minecraft.client.Minecraft.runTick(Minecraft.java:1180) ~[client-intermediary.jar:?] at net.minecraft.client.Minecraft.run(Minecraft.java:801) ~[client-intermediary.jar:?] at net.minecraft.client.main.Main.main(Main.java:237) ~[minecraft-1.19.4-client.jar:?] at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:462) ~[fabric-loader-0.14.18.jar:?] at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:74) ~[fabric-loader-0.14.18.jar:?] at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23) ~[fabric-loader-0.14.18.jar:?] at org.prismlauncher.launcher.impl.StandardLauncher.launch(StandardLauncher.java:88) ~[NewLaunch.jar:?] at org.prismlauncher.EntryPoint.listen(EntryPoint.java:126) ~[NewLaunch.jar:?] at org.prismlauncher.EntryPoint.main(EntryPoint.java:71) ~[NewLaunch.jar:?] Caused by: java.lang.Throwable: Manually triggered debug crash
at net.minecraft.client.KeyboardHandler.tick(KeyboardHandler.java:506) ~[client-intermediary.jar:?] ... 10 more

Requires:

Fabric Modloader

Fabric API

How to install:

How To Download & Install Mods with Minecraft Forge

How To Download & Install Fabric Mods

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Stack Deobfuscator Mod (1.21, 1.20.1) Download Links

Other Version:

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For Minecraft 1.20.5

Fabric version: Download from Server 1 – Download from Server 2

For All Versions from Minecraft 1.14.4 to Minecraft 1.20.4, 1.20.3, 1.20.2, 1.20.1

Fabric version: Download from Server 1 – Download from Server 2

For Minecraft 1.20.6

Fabric version: Download from Server 1 – Download from Server 2

For Minecraft 1.21

Fabric version: Download from Server 1 – Download from Server 2

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