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[26.3] NMSSignListener 处理牌子提交包时抛 ClassCastException（ArrayList cannot be cast to String[]） #735
Description
问题描述
在 Folia 26.3 上使用 Player.inputSign() 捕获告示牌输入，玩家编辑完牌子点「完成」时服务端抛 ClassCastException，回调永远不会执行。
NMSSignListener.onReceive 里的版本判断用的是：
val lines = when {
MinecraftVersion.isHigherOrEqual(MinecraftVersion.V1_17) -> event.packet.read<Array<String>>("lines")!!
MinecraftVersion.isHigherOrEqual(MinecraftVersion.V1_9) -> event.packet.read<Array<String>>("b")!!
else -> event.packet.read<Array<Any>>("b")!!.map { NMSSign.instance.deserialize(it) }.toTypedArray()
}26.3 满足 isHigherOrEqual(V1_17)，于是按 1.17+ 的路径读取 Array<String>，但 26.3 的包字段实际是 List<String>（ArrayList），强转直接失败。
Gradle配置
version { taboolib = "6.3.0-0e3a911" }复现代码
player.inputSign(context.parse(signContent).toTypedArray()) { lines ->
// 26.3 上不会执行到这里
println(lines.joinToString(""))
}报错日志
Caused by: java.lang.ClassCastException: class java.util.ArrayList cannot be cast to class [Ljava.lang.String; (java.util.ArrayList is in module java.base of loader 'bootstrap')
at taboolib.module.nms.NMSSignListener.onReceive(NMSSignListener.kt:49)
at taboolib.library.reflex.JavaClassMethod.invoke(JavaClassMethod.kt:61)
...
at taboolib.module.nms.MeteorInjector.onPacketReceive(MeteorInjector.java:184)
建议修复
在 when 最前面加一个 26.3 分支，按 List<String> 读取：
val lines = when {
MinecraftVersion.major == MinecraftVersion.V26_3 ->
event.packet.read<List<String>>("lines")!!.toTypedArray()
MinecraftVersion.isHigherOrEqual(MinecraftVersion.V1_17) -> event.packet.read<Array<String>>("lines")!!
...
}
Activity