Question Weird java bug only with 1.20.6 (only on paper)

B

Black_Eyes

New member
Jun 11, 2024
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So, I have a particle API in my plugin that uses some reflections. Don't worry, that's not the main topic, even I don't understand reflection totally.
I have an 1.20.4 test server using jdk 22, and an 1.20.6 test server using the same JDK.

My plugin works from 1.8 to 1.20.4.
On 1.20.6, I have this issue:
Code: 
[21:26:49 ERROR]: Error occurred while enabling LootChest v2.4.0 (Is it up to date?)
java.lang.ExceptionInInitializerError: null
        at LootChest.jar/fr.black_eyes.lootchest.particles.ParticleTypes.<clinit>(ParticleTypes.java:18) ~[LootChest.jar:?]
        at LootChest.jar/fr.black_eyes.lootchest.particles.ParticleType.of(ParticleType.java:16) ~[LootChest.jar:?]
        at LootChest.jar/fr.black_eyes.lootchest.particles.Particle.<init>(Particle.java:215) ~[LootChest.jar:?]
        at LootChest.jar/fr.black_eyes.lootchest.particles.Particle.<clinit>(Particle.java:29) ~[LootChest.jar:?]
        at LootChest.jar/fr.black_eyes.lootchest.Main.initParticles(Main.java:521) ~[LootChest.jar:?]
        at LootChest.jar/fr.black_eyes.lootchest.Main.onEnable(Main.java:223) ~[LootChest.jar:?]
        at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:287) ~[paper-api-1.20.6-R0.1-SNAPSHOT.jar:?]
        at io.papermc.paper.plugin.manager.PaperPluginInstanceManager.enablePlugin(PaperPluginInstanceManager.java:202) ~[paper-1.20.6.jar:1.20.6-138-906df69]
        at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.enablePlugin(PaperPluginManagerImpl.java:109) ~[paper-1.20.6.jar:1.20.6-138-906df69]
        at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:519) ~[paper-api-1.20.6-R0.1-SNAPSHOT.jar:?]
        at org.bukkit.craftbukkit.CraftServer.enablePlugin(CraftServer.java:604) ~[paper-1.20.6.jar:1.20.6-138-906df69]
        at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:553) ~[paper-1.20.6.jar:1.20.6-138-906df69]
        at net.minecraft.server.MinecraftServer.loadWorld0(MinecraftServer.java:675) ~[paper-1.20.6.jar:1.20.6-138-906df69]
        at net.minecraft.server.MinecraftServer.loadLevel(MinecraftServer.java:437) ~[paper-1.20.6.jar:1.20.6-138-906df69]
        at net.minecraft.server.dedicated.DedicatedServer.initServer(DedicatedServer.java:323) ~[paper-1.20.6.jar:1.20.6-138-906df69]
        at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1136) ~[paper-1.20.6.jar:1.20.6-138-906df69]
        at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:323) ~[paper-1.20.6.jar:1.20.6-138-906df69]
        at java.base/java.lang.Thread.run(Thread.java:1570) ~[?:?]
Caused by: java.lang.StringIndexOutOfBoundsException: Range [23, 22) out of bounds for length 22
        at java.base/jdk.internal.util.Preconditions$1.apply(Preconditions.java:55) ~[?:?]
        at java.base/jdk.internal.util.Preconditions$1.apply(Preconditions.java:52) ~[?:?]
        at java.base/jdk.internal.util.Preconditions$4.apply(Preconditions.java:213) ~[?:?]
        at java.base/jdk.internal.util.Preconditions$4.apply(Preconditions.java:210) ~[?:?]
        at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:98) ~[?:?]
        at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckFromToIndex(Preconditions.java:112) ~[?:?]
        at java.base/jdk.internal.util.Preconditions.checkFromToIndex(Preconditions.java:349) ~[?:?]        at java.base/java.lang.String.checkBoundsBeginEnd(String.java:4914) ~[?:?]
        at java.base/java.lang.String.substring(String.java:2876) ~[?:?]
        at java.base/java.lang.String.substring(String.java:2849) ~[?:?]
        at LootChest.jar/fr.black_eyes.lootchest.particles.FastReflection.<clinit>(FastReflection.java:18) ~[LootChest.jar:?]
        ... 18 more

Here is the line of code referenced by the error, the first "static final Class<?>" is the 18th line, the one referenced by the error

Java: 
    static final Class<?> BLOCK_DATA_CLASS = FastReflection.optionalClass("org.bukkit.block.data.BlockData").orElse(null);
    static final Class<?> DUST_OPTIONS_CLASS = FastReflection.optionalClass("org.bukkit.Particle$DustOptions").orElse(null);
    static final Class<?> DUST_TRANSITION_CLASS = FastReflection.optionalClass("org.bukkit.Particle$DustTransition").orElse(null);
    static final Map<Class<?>, Class<?>> DATA_ADAPTERS = new HashMap<>();
    static final boolean LEGACY = !FastReflection.optionalClass("org.bukkit.Particle").isPresent();

Does someone knows why a line like this would cause this weird error in this specific minecraft version? This doesn't occurs on spigot
 
Last edited:
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