ClassCastException

[Cubxity]

Stacktrace:

SEVERE: Unable to launch
java.lang.ClassCastException: org.apache.logging.log4j.simple.SimpleLogger cannot be cast to org.apache.logging.log4j.core.Logger
	at org.spongepowered.asm.mixin.MixinEnvironment$MixinLogger.<init>(MixinEnvironment.java:679)
	at org.spongepowered.asm.mixin.MixinEnvironment.init(MixinEnvironment.java:1235)
	at org.spongepowered.asm.launch.MixinBootstrap.start(MixinBootstrap.java:157)
	at org.spongepowered.asm.launch.MixinBootstrap.init(MixinBootstrap.java:122)
	at cc.hyperium.launch.HyperiumTweaker.injectIntoClassLoader(HyperiumTweaker.kt:224)
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:111)
	at net.minecraft.launchwrapper.Launch.main(Launch.java:27)```
Does anyone know what is the problem?

[mikroskeem]

What Mixin library version?

[Cubxity]

0.6.4 SNAPSHOT

compile('org.spongepowered:mixin:0.6.4-SNAPSHOT') {
        exclude module: 'launchwrapper'
        exclude module: 'guava'
        exclude module: 'gson'
        exclude module: 'commons-io'
        }```

[mikroskeem]

org.apache.logging.log4j.core.Logger log = (org.apache.logging.log4j.core.Logger)LogManager.getLogger("FML"); is (possible) culprit.

[Cubxity]

Wdym?

[Cubxity]

• I am not using Forge

[mikroskeem]

You don't need to use Forge for that. MixinLogger class expects Log4j2 LogManager#getLogger to return org.apache.logging.log4j.core.Logger implementation, but that's not in the case.

So any idea how SimpleLogger gets used instead?

[Cubxity]

I have no idea, the source code is at https://github.com/HyperiumClient/Hyperium you can take a look

[mikroskeem]

Looks like log4j-core is not available for some reason. I suggest Hyperium developers to find workaround for that. Furthermore Mixin could implement instanceof check to not catch fire like this on startup :P

[Cubxity]

When I run the client from Workspace it worked fine, but not when I run from the launcher

[Cubxity]

Anyone?

[Mumfrey]

Sorry I'm away at the moment until early next week. I'll take a look into it when I get back, I suspect there's a simple fix for it but that code was added as part of the initphase scaffolding so I can't remember who wrote it or why it would use a concrete class rather than an interface.

[Cubxity]

SEVERE: Unable to launch
java.lang.ClassCastException: org.apache.logging.log4j.simple.SimpleLogger cannot be cast to org.apache.logging.log4j.core.Logger
	at org.spongepowered.asm.mixin.MixinEnvironment.gotoPhase(MixinEnvironment.java:1431)
	at org.spongepowered.asm.mixin.EnvironmentStateTweaker.getLaunchArguments(EnvironmentStateTweaker.java:58)
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:122)
	at net.minecraft.launchwrapper.Launch.main(Launch.java:27)

Still does not work, please reopen

[Cubxity]

@Mumfrey

[Cubxity]

@Mumfrey so I need to use version 0.7.7 right?

[Mumfrey]

Yes. In general you should always be using the latest version because Mixin guarantees backward compatibility so your mixins will not break with newer versions, however you benefit from improvements in the core and in compatibility and stability improvements.

[Mumfrey]

See also this PSA about the use of minVersion.

[Cubxity]

is the maven repo updated?

[Cubxity]

also do you have discord so I can contact you easier?

[Mumfrey]

is the maven repo updated?

Yes.

also do you have discord so I can contact you easier?

No I can't stand discord, you can contact me on IRC in #spongedev on esper if necessary. If my nick name has uppercase M then I'm online, lowercase m is my bouncer.