Kotlinx.serialization: NoSuchMethodError: No virtual method getDeclaredAnnotation on Android API level <24

[brewin]

Describe the bug

java.lang.NoSuchMethodError: No virtual method getDeclaredAnnotation(Ljava/lang/Class;)Ljava/lang/annotation/Annotation; in class Ljava/lang/Class; or its super classes (declaration of 'java.lang.Class' appears in /system/framework/core-libart.jar)
        at kotlinx.serialization.internal.PlatformKt.polymorphicSerializer(Platform.kt:70)
        at kotlinx.serialization.internal.PlatformKt.constructSerializerForGivenTypeArgs(Platform.kt:53)
        at kotlinx.serialization.internal.PlatformKt.compiledSerializerImpl(Platform.kt:23)
        at kotlinx.serialization.SerializersKt__SerializersKt.serializerOrNull(Serializers.kt:129)
        at kotlinx.serialization.SerializersKt.serializerOrNull(Unknown Source)
        at kotlinx.serialization.SerializersKt__SerializersKt.serializerByKTypeImpl$SerializersKt__SerializersKt(Serializers.kt:65)
        at kotlinx.serialization.SerializersKt__SerializersKt.serializer(Serializers.kt:51)
        at kotlinx.serialization.SerializersKt.serializer(Unknown Source)
        at kotlinx.serialization.SerializersKt__SerializersKt.builtinSerializerOrNull$SerializersKt__SerializersKt(Serializers.kt:76)
        at kotlinx.serialization.SerializersKt__SerializersKt.serializerByKTypeImpl$SerializersKt__SerializersKt(Serializers.kt:66)
        at kotlinx.serialization.SerializersKt__SerializersKt.serializer(Serializers.kt:51)
        at kotlinx.serialization.SerializersKt.serializer(Unknown Source)
        at com.example.myapplication.MainActivity.onCreate(MainActivity.kt:17)

Related issue with resolution

To Reproduce
On Android API level <24:

Json.decodeFromString<List<Int>>("[0,1,2,3]")

Environment

• Kotlin version: 1.4.0
• Library version: 1.0.0-RC
• Kotlin platforms: JVM (Android)
• Gradle version: 6.1.1

[slavonnet]

+1 need on next rc

[webfrea-k]

Is there any version with this fix available yet (even dev would be great)?

[sandwwraith]

@webfrea-k We plan to release RC2 with this fix soon

[stramek]

Is there any approx ETA by a chance for the RC2?

[qwwdfsad]

~this week

[slavonnet]

7 days ago..... i want migrade from gson but android 23....

[iNdieboyjeff]

Yes, an ETA for RC2 would be very helpful as the fix is needed very urgently

[qwwdfsad]

We are in the process of releasing it but are encountering problems with build infrastructure. Either today or tomorrow it should be released

[sandwwraith]

The 1.0.0-RC2 is out now and should be available on JCenter