What is this? ```java.lang.VerifyError: class kotlinx.serialization.json.internal.StreamingJsonDecod...

# serialization

[ribesg]

What is this?

java.lang.VerifyError: class kotlinx.serialization.json.internal.StreamingJsonDecoder overrides final method kotlinx.serialization.encoding.AbstractDecoder.decodeSerializableElement(Lkotlinx/serialization/descriptors/SerialDescriptor;ILkotlinx/serialization/DeserializationStrategy;Ljava/lang/Object;)Ljava/lang/Object;

[Petter Måhlén]

could it be a version mismatch between kotlinx-serialization-core and kotlinx-serialization-json?

[ribesg]

Maybe. I get this crash in a script which depends on a kmp lib. The kmp lib has this dependency, among others.

"commonMainApi"("org.jetbrains.kotlinx:kotlinx-serialization-json:${Versions.serialization}")

[ribesg]

Maybe explicitly adding the dependency on core too can help, I’ll try it

[ribesg]

A bad version of core could be imported as a transitive dependency of another dependency like ktor or something

[ribesg]

That doesn’t seem to work

[ribesg]

It started from a version that had a few changes, but one of them is adding dependency to ktor resources plugin so maybe it’s a transitive dependency of that

"commonMainApi"("io.ktor:ktor-client-resources:${Versions.ktor}")

[ribesg]

I fixed it by adding this

"commonMainApi"("org.jetbrains.kotlinx:kotlinx-serialization-core:${Versions.serialization}")

and tweaking the dependency on ktor-client-resources

"commonMainApi"("io.ktor:ktor-client-resources:${Versions.ktor}") {
    exclude("org.jetbrains.kotlinx", "kotlinx-serialization-core")
}