Details
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Type:
Bug
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Status: Resolved
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Resolution: Invalid
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Affects Version/s: Minecraft 1.12.2
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Fix Version/s: None
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Labels:
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Environment:Windows 10 64-bit
Java Runtime Environment 10.0.1
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Confirmation Status:Unconfirmed
Description
I am unable to launch modded Minecraft using the latest Minecraft Launcher with Java 10. I am reporting this bug in the Mojang Bug Tracker because it has something to do with the Minecraft Launch Wrapper.
Here's the last line in the launcher_log.txt:
[0614/144307:INFO:GameCallbacks.cpp(178)] launcher/launcher (main) info Exception in thread "main" java.lang.ClassCastException: java.base/jdk.internal.loader.ClassLoaders$AppClassLoader cannot be cast to java.base/java.net.URLClassLoader[0614/144307:INFO:GameCallbacks.cpp(178)] launcher/launcher (main) info Exception in thread "main" java.lang.ClassCastException: java.base/jdk.internal.loader.ClassLoaders$AppClassLoader cannot be cast to java.base/java.net.URLClassLoader
at net.minecraft.launchwrapper.Launch.<init>(Launch.java:34)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Steps to reproduce
Install any modification for Minecraft (OptiFine for example)
Note that the bug here is the Minecraft Launch Wrapper, which is a Minecraft library, and not the modification.
