Add internal ByteReadPacket.unsupportedFlag

mirai-core/src/commonMain/kotlin/net.mamoe.mirai/utils/io/InputUtils.kt

-@file:Suppress("EXPERIMENTAL_API_USAGE", "EXPERIMENTAL_UNSIGNED_LITERALS")
+@file:Suppress("EXPERIMENTAL_API_USAGE", "EXPERIMENTAL_UNSIGNED_LITERALS", "NOTHING_TO_INLINE")
 
 package net.mamoe.mirai.utils.io
 
@@ -140,10 +140,11 @@ fun Map<UInt, ByteArray>.printTLVMap(name: String = "", keyLength: Int = 1) =
         }
     })
 
-@Suppress("NOTHING_TO_INLINE")
 internal inline fun unsupported(message: String? = null): Nothing = error(message ?: "Unsupported")
 
-@Suppress("NOTHING_TO_INLINE")
+internal inline fun ByteReadPacket.unsupportedFlag(name: String, flag: String): Nothing = error("Unsupported flag of $name. flag=$flag, remaining=${readBytes().toUHexString()}")
+internal inline fun ByteReadPacket.unsupportedType(name: String, type: String): Nothing = error("Unsupported type of $name. type=$type, remaining=${readBytes().toUHexString()}")
+
 internal inline fun illegalArgument(message: String? = null): Nothing = error(message ?: "Illegal argument passed")
 
 @JvmName("printTLVStringMap")