Fix nested struct list serializing

mirai-core-qqandroid/src/commonMain/kotlin/net/mamoe/mirai/qqandroid/io/serialization/Jce.kt

@@ -150,7 +150,7 @@ class Jce private constructor(private val charset: JceCharset, context: SerialMo
                         serializer.serialize(this, value)
                     } else {
                         this.writeHead(STRUCT_BEGIN, popTag())
-                        serializer.serialize(this, value)
+                        serializer.serialize(JceEncoder(this.output), value)
                         this.writeHead(STRUCT_END, 0)
                     }
                 } else if (value is ProtoBuf) {

mirai-core-qqandroid/src/jvmTest/kotlin/net.mamoe.mirai.qqandroid.io.serialization/JceDecoderTest.kt

@@ -7,6 +7,7 @@ import net.mamoe.mirai.qqandroid.io.JceOutput
 import net.mamoe.mirai.qqandroid.io.JceStruct
 import net.mamoe.mirai.qqandroid.io.buildJcePacket
 import net.mamoe.mirai.utils.cryptor.contentToString
+import net.mamoe.mirai.utils.io.toUHexString
 import kotlin.test.Test
 import kotlin.test.assertEquals
 
@@ -177,4 +178,20 @@ class JceDecoderTest {
         assert(AllNullJce().toByteArray(AllNullJce.serializer()).isEmpty())
         assertEquals(ByteArray(0).loadAs(AllNullJce.serializer()), AllNullJce())
     }
+
+    @Test
+    fun testNestedStruct() {
+        @Serializable
+        class OuterStruct(
+            @SerialId(0) val innerSturctList: List<TestSimpleJceStruct>
+        ) : JceStruct
+
+        assertEquals(
+            buildJcePacket {
+                writeCollection(listOf(TestSimpleJceStruct(), TestSimpleJceStruct()), 0)
+            }.readBytes().toUHexString(),
+            OuterStruct(listOf(TestSimpleJceStruct(), TestSimpleJceStruct())).toByteArray(OuterStruct.serializer()).toUHexString()
+        )
+        //println(OuterStruct(listOf(TestSimpleJceStruct(), TestSimpleJceStruct())).toByteArray(OuterStruct.serializer()).loadAs(OuterStruct.serializer()))
+    }
 }
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