// RUN_PIPELINE_TILL: FRONTEND
fun test() {
    val resultA = pcla { otvOwner ->
        val pntvOwner = otvOwner.createDerivativeTypeVariable()
        otvOwner.constrainBox(pntvOwner.provide()) // PNTv <: Box<OTv>

        // Box<ScopeOwner> <: PNTv
        pntvOwner.constrain(Box<ScopeOwner>())

        // expected current state of the constraint system:
        // Box<ScopeOwner> <: PNTv <: Box<OTv>

        // should fix PNTv := Box<ScopeOwner> & OTv := ScopeOwner for scope navigation
        otvOwner.provide().function()

        // expected: Interloper </: ScopeOwner
        otvOwner.constrain(<!ARGUMENT_TYPE_MISMATCH("Interloper; ScopeOwner")!>Interloper<!>)
    }
    // expected: ScopeOwner
    <!DEBUG_INFO_EXPRESSION_TYPE("ScopeOwner")!>resultA<!>

    val resultB = pcla { otvOwner ->
        val pntvOwner = otvOwner.createDerivativeTypeVariable()
        otvOwner.constrainBox(pntvOwner.provide()) // PNTv <: Box<OTv>

        // ScopeOwner <: OTv
        otvOwner.constrain(ScopeOwner())

        // expected current state of the constraint system:
        // PNTv <: Box<OTv>
        // ScopeOwner <: OTv

        // should fix PNTv := Box<OTv> & OTv := ScopeOwner for scope navigation
        pntvOwner.provide().unbox().function()

        // expected: Interloper </: ScopeOwner
        otvOwner.constrain(<!ARGUMENT_TYPE_MISMATCH("Interloper; ScopeOwner")!>Interloper<!>)
    }
    // expected: ScopeOwner
    <!DEBUG_INFO_EXPRESSION_TYPE("ScopeOwner")!>resultB<!>
}


class Box<BXT> {
    fun unbox(): BXT = null!!
}

class TypeVariableOwner<T> {
    fun constrain(subtypeValue: T) {}
    fun provide(): T = null!!
    fun <PNT> createDerivativeTypeVariable(): TypeVariableOwner<PNT> = TypeVariableOwner()
    fun constrainBox(subtypeValue: Box<T>) {}
}

fun <OT> pcla(lambda: (TypeVariableOwner<OT>) -> Unit): OT = null!!

interface BaseType

class ScopeOwner: BaseType {
    fun function() {}
}

object Interloper: BaseType

/* GENERATED_FIR_TAGS: checkNotNullCall, classDeclaration, functionDeclaration, functionalType, interfaceDeclaration,
lambdaLiteral, localProperty, nullableType, objectDeclaration, propertyDeclaration, typeParameter */
