FILE /extensionLambda.kt
  FUN public fun test1(): kotlin.Int
    BLOCK_BODY
      RETURN type=kotlin.Nothing from=test1
        CALL .run type=kotlin.Int operator=null
          $receiver: CONST String type=kotlin.String value='42'
          block: BLOCK type=kotlin.String.() -> kotlin.Int operator=LAMBDA
            FUN local final fun kotlin.String.<anonymous>(): kotlin.Int
              BLOCK_BODY
                RETURN type=kotlin.Nothing from=<anonymous>
                  CALL .<get-length> type=kotlin.Int operator=GET_PROPERTY
                    $this: $RECEIVER of: <anonymous> type=kotlin.String
            CALLABLE_REFERENCE local final fun kotlin.String.<anonymous>(): kotlin.Int type=kotlin.String.() -> kotlin.Int
