openide/plugins/kotlin/idea/tests/testData/quickfix/replaceInfixOrOperatorCall/plusAssignOnMutableMap.kt

// "Replace with safe (?.) call" "false"
// WITH_STDLIB
// ACTION: Add non-null asserted (map[3]!!) call
// ACTION: Replace overloaded operator with function call
// ACTION: Replace with ordinary assignment
// ERROR: Operator call corresponds to a dot-qualified call 'map[3].plusAssign(5)' which is not allowed on a nullable receiver 'map[3]'.
fun test(map: MutableMap<Int, Int>) {
    map[3] +=<caret> 5
}