Gradle transformJvmMainAtomicfu failed when using atomic() in companion obj

[Him188]

Caused by: java.lang.ArrayIndexOutOfBoundsException: Index -1 out of bounds for length 0
        at org.objectweb.asm.Frame.a(Unknown Source)
        at org.objectweb.asm.MethodWriter.visitMaxs(Unknown Source)
        at org.objectweb.asm.tree.MethodNode.accept(Unknown Source)
        at kotlinx.atomicfu.transformer.AtomicFUTransformer$TransformerMV.visitEnd(AtomicFUTransformer.kt:611)
        at org.objectweb.asm.ClassReader.b(Unknown Source)
        at org.objectweb.asm.ClassReader.accept(Unknown Source)
        at org.objectweb.asm.ClassReader.accept(Unknown Source)
        at kotlinx.atomicfu.transformer.AtomicFUTransformer.transformFile(AtomicFUTransformer.kt:237)
        at kotlinx.atomicfu.transformer.AtomicFUTransformer.transform(AtomicFUTransformer.kt:172)
        at kotlinx.atomicfu.plugin.gradle.AtomicFUTransformTask.transform(AtomicFUGradlePlugin.kt:387)

This works fine

class Bot( ... ) {
    private val count = atomic<Int>(0)

    val id = count.getAndUpdate { it + 1 }
}

But this doesn't work

class Bot( ... ){
    val id = count.getAndUpdate { it + 1 }

    companion object {
      private val count = atomic<Int>(0)
    }
}

And after I removed private, I got a new exception Unsupported return within atomic operation

[Him188]

Exceptions are the same when using atomic(0) instead of atomic<Int>(0)

[elizarov]

Have you found a workaround or an issue was resolved?

[Him188]

@elizarov No.

[Him188]

It might because count is private in the companion, accessing it from outside the companion object produces that issue.

I added a new fun to do getAndIncrease in the companion, which works well

companion object{
private val count = atomic(0)
fun nextCount() = count.getAndIncrease()