kotlin/compiler/testData/diagnostics/tests/declarationChecks/DataFlowInMultiDeclInFor.kt

// KT-2667 Support multi-declarations in for-loops in control flow analysis
package d

import java.util.List

class A {
    fun component1() = 1
    fun component2() = 2
    fun component3() = 3
}

fun foo(list: List<A>) {
    for (var (c1, c2, c3) in list) {
        c1 = <!UNUSED_VALUE!>1<!>
        c3 + 1
    }
}