IrFile /arrayAugmentedAssignment2.kt
  DUMMY IA
  DUMMY IB
  IrFunction public fun IB.test(/*0*/ a: IA): kotlin.Unit
    IrExpressionBody
      BLOCK type=<no-type> hasResult=false operator=null
        BLOCK type=kotlin.Unit hasResult=false operator=PLUSEQ
          CALL .set type=kotlin.Unit operator=PLUSEQ
            $this: $RECEIVER of: test type=IB
            $receiver: GET_VAR a type=IA operator=null
            index: LITERAL String type=kotlin.String value=''
            value: CALL .plus type=kotlin.Int operator=PLUSEQ
              $this: CALL .get type=kotlin.Int operator=PLUSEQ
                $this: GET_VAR a type=IA operator=null
                index: LITERAL String type=kotlin.String value=''
              other: LITERAL Int type=kotlin.Int value='42'