[core] Fix minor compiler warnings

- unused variables
- requires opt-in

mirai-core-utils/src/jvmBaseMain/kotlin/Services.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2019-2022 Mamoe Technologies and contributors.
+ * Copyright 2019-2023 Mamoe Technologies and contributors.
  *
  * 此源代码的使用受 GNU AFFERO GENERAL PUBLIC LICENSE version 3 许可证的约束, 可以在以下链接找到该许可证.
  * Use of this source code is governed by the GNU AGPLv3 license that can be found through the following link.
@@ -56,7 +56,7 @@ public actual fun <T : Any> loadService(clazz: KClass<out T>, fallbackImplementa
 
     return Services.getOverrideOrNull(clazz) ?: services
     ?: throw NoSuchElementException("Could not find an implementation for service class ${clazz.qualifiedName}").apply {
-        if (suppressed != null) addSuppressed(suppressed)
+        if (suppressed != null) addSuppressed(suppressed!!)
     }
 }
 

mirai-core-utils/src/jvmBaseMain/kotlin/ThreadLocal.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2019-2022 Mamoe Technologies and contributors.
+ * Copyright 2019-2023 Mamoe Technologies and contributors.
  *
  * 此源代码的使用受 GNU AFFERO GENERAL PUBLIC LICENSE version 3 许可证的约束, 可以在以下链接找到该许可证.
  * Use of this source code is governed by the GNU AGPLv3 license that can be found through the following link.
@@ -18,4 +18,5 @@ public fun <T : Any?> threadLocal(newInstance: () -> T): ThreadLocal<T> {
     }
 }
 
-public operator fun <T> ThreadLocal<T>.getValue(t: Any?, property: KProperty<Any?>): T = this.get()
+public operator fun <T> ThreadLocal<T>.getValue(t: Any?, property: KProperty<Any?>): T =
+    this.get() as T // `get()` is from Java and has type of `T!`

mirai-core/src/commonMain/kotlin/message/protocol/impl/GeneralMessageSenderProtocol.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2019-2022 Mamoe Technologies and contributors.
+ * Copyright 2019-2023 Mamoe Technologies and contributors.
  *
  * 此源代码的使用受 GNU AFFERO GENERAL PUBLIC LICENSE version 3 许可证的约束, 可以在以下链接找到该许可证.
  * Use of this source code is governed by the GNU AGPLv3 license that can be found through the following link.
@@ -73,7 +73,7 @@ internal class GeneralMessageSenderProtocol : MessageProtocol(PRIORITY_GENERAL_S
 
             // Patch time to be actual server time
             var finalTime = bot.clock.server.currentTimeSeconds().toInt()
-            val sendPacketOk = sendAllPackets(bot, step, contact, packets) { idx, rsp ->
+            val sendPacketOk = sendAllPackets(bot, step, contact, packets) { _, rsp ->
                 if (rsp is MessageSvcPbSendMsg.Response.SUCCESS) {
                     finalTime = rsp.sendTime
                 }

mirai-core/src/commonMain/kotlin/message/source/incomingSourceImpl.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2019-2022 Mamoe Technologies and contributors.
+ * Copyright 2019-2023 Mamoe Technologies and contributors.
  *
  * 此源代码的使用受 GNU AFFERO GENERAL PUBLIC LICENSE version 3 许可证的约束, 可以在以下链接找到该许可证.
  * Use of this source code is governed by the GNU AGPLv3 license that can be found through the following link.
@@ -96,7 +96,7 @@ internal class OnlineMessageSourceFromFriendImpl(
     }
 
 
-    private val jceData: ImMsgBody.SourceMsg by lazy { msg.toJceDataPrivate(internalIds) }
+    private val jceData: ImMsgBody.SourceMsg by lazy { msg.toJceDataPrivate() }
 
     override fun toJceData(): ImMsgBody.SourceMsg = jceData
 
@@ -161,7 +161,7 @@ internal class OnlineMessageSourceFromStrangerImpl(
         }
     }
 
-    private val jceData: ImMsgBody.SourceMsg by lazy { msg.toJceDataPrivate(internalIds) }
+    private val jceData: ImMsgBody.SourceMsg by lazy { msg.toJceDataPrivate() }
 
     override fun toJceData(): ImMsgBody.SourceMsg = jceData
 
@@ -170,7 +170,7 @@ internal class OnlineMessageSourceFromStrangerImpl(
     }
 }
 
-private fun List<MsgComm.Msg>.toJceDataPrivate(ids: IntArray): ImMsgBody.SourceMsg {
+private fun List<MsgComm.Msg>.toJceDataPrivate(): ImMsgBody.SourceMsg {
     val elements = flatMap { it.msgBody.richText.elems }.toMutableList().also {
         if (it.lastOrNull()?.elemFlags2 == null) it.add(ImMsgBody.Elem(elemFlags2 = ImMsgBody.ElemFlags2()))
     }
@@ -279,7 +279,7 @@ internal class OnlineMessageSourceFromTempImpl(
         get() = msg.first().msgHead.toUin
 
 
-    private val jceData: ImMsgBody.SourceMsg by lazy { msg.toJceDataPrivate(internalIds) }
+    private val jceData: ImMsgBody.SourceMsg by lazy { msg.toJceDataPrivate() }
     override fun toJceData(): ImMsgBody.SourceMsg = jceData
 
     override fun <D, R> accept(visitor: MessageVisitor<D, R>, data: D): R {

mirai-core/src/commonMain/kotlin/network/auth/ProducerState.kt

@@ -11,6 +11,7 @@ package net.mamoe.mirai.internal.network.auth
 
 import kotlinx.coroutines.CompletableDeferred
 import kotlinx.coroutines.Deferred
+import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlin.coroutines.CoroutineContext
 
 /**
@@ -133,6 +134,7 @@ internal sealed interface ProducerState<T, V> {
         val producerLatch = Latch<T>(parentCoroutineContext)
 
         override fun toString(): String {
+            @OptIn(ExperimentalCoroutinesApi::class)
             val completed =
                 value.runCatching { getCompleted().toString() }.getOrNull() // getCompleted() is experimental
             return "Consuming(value=$completed)"

mirai-core/src/jvmBaseMain/kotlin/message/protocol/impl/TextProtocol.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2019-2022 Mamoe Technologies and contributors.
+ * Copyright 2019-2023 Mamoe Technologies and contributors.
  *
  * 此源代码的使用受 GNU AFFERO GENERAL PUBLIC LICENSE version 3 许可证的约束, 可以在以下链接找到该许可证.
  * Use of this source code is governed by the GNU AGPLv3 license that can be found through the following link.
@@ -10,6 +10,6 @@
 package net.mamoe.mirai.internal.message.protocol.impl
 
 internal actual fun getEmojiPatternResourceOrNull(): String? {
-    return TextProtocol::class.java.classLoader.getResourceAsStream("emoji-pattern.regex")
+    return TextProtocol::class.java.classLoader?.getResourceAsStream("emoji-pattern.regex")
         ?.use { it.readBytes().decodeToString() }
 }