Incompatibility with Purpur / Yatopia (Paper Spigot) forks.

RE: https://github.com/YatopiaMC/Yatopia/issues/313#issuecomment-741814539

[05:40:17] [Server thread/INFO]: [Magic] Enabling Magic v8.2-SNAPSHOT-aa1db08
[05:40:17] [Server thread/WARN]: [Magic] �[33m An error occurred, setting arrow lifespan will not work�[0m
java.lang.NoSuchFieldException: ar
	at java.lang.Class.getDeclaredField(Class.java:2489) ~[?:?]
	at com.elmakers.mine.bukkit.utility.NMSUtils.initialize(NMSUtils.java:1513) ~[?:?]
	at com.elmakers.mine.bukkit.magic.MagicPlugin.onEnable(MagicPlugin.java:171) ~[?:?]
	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:263) ~[patched_1.16.4.jar:git-Yatopia-"098c015"]
	at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:380) ~[patched_1.16.4.jar:git-Yatopia-"098c015"]
	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:483) ~[patched_1.16.4.jar:git-Yatopia-"098c015"]
	at org.bukkit.craftbukkit.v1_16_R3.CraftServer.enablePlugin(CraftServer.java:501) ~[patched_1.16.4.jar:git-Yatopia-"098c015"]
	at org.bukkit.craftbukkit.v1_16_R3.CraftServer.enablePlugins(CraftServer.java:415) ~[patched_1.16.4.jar:git-Yatopia-"098c015"]
	at net.minecraft.server.v1_16_R3.MinecraftServer.loadWorld(MinecraftServer.java:471) ~[patched_1.16.4.jar:git-Yatopia-"098c015"]
	at net.minecraft.server.v1_16_R3.DedicatedServer.init(DedicatedServer.java:259) ~[patched_1.16.4.jar:git-Yatopia-"098c015"]
	at net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:941) ~[patched_1.16.4.jar:git-Yatopia-"098c015"]
	at net.minecraft.server.v1_16_R3.MinecraftServer.lambda$a$0(MinecraftServer.java:180) ~[patched_1.16.4.jar:git-Yatopia-"098c015"]
	at java.lang.Thread.run(Thread.java:832) [?:?]

Caused by this breaking patch? https://github.com/pl3xgaming/Purpur/blob/ver/1.16.4/patches/server/0121-Despawn-rate-config-options-per-projectile-type.patch

[NathanWolf]

Thanks for the info!

I think the issue is that it was moved to IProjectile - ha yeah what you just said.

[jpenilla]

Actually, this field has been called despawnCounter since 1.13+… (renamed in Spigot mappings, not by Paper or any fork) and this can be seen in your own source code here. https://github.com/elBukkit/MagicPlugin/blob/master/CompatibilityLib/src/main/java/com/elmakers/mine/bukkit/utility/NMSUtils.java#L1504

The issue is your plugin is for some reason trying to use your “1.8.3” ar mapping.

Now I see the reason your plugin is doing this. You use getDeclaredMethod which will no longer work as the field has been moved to the parent class. The patch in question is a Paper PR which will be merged somewhat soon, so fixing this on your end is desirable