vlib/v/checker/tests/immutable_array_in_if_expr_index.vv:4:6: notice: condition is always true
    2 |     array_a := [1, 2, 3]
    3 |     array_b := [4, 5, 6]
    4 |     (if true { array_a } else { array_b })[0] = 999
      |         ~~~~
    5 |     println(array_a)
    6 | }
vlib/v/checker/tests/immutable_array_in_if_expr_index.vv:4:13: error: `array_a` is immutable, declare it with `mut` to make it mutable
    2 |     array_a := [1, 2, 3]
    3 |     array_b := [4, 5, 6]
    4 |     (if true { array_a } else { array_b })[0] = 999
      |                ~~~~~~~
    5 |     println(array_a)
    6 | }
vlib/v/checker/tests/immutable_array_in_if_expr_index.vv:4:30: error: `array_b` is immutable, declare it with `mut` to make it mutable
    2 |     array_a := [1, 2, 3]
    3 |     array_b := [4, 5, 6]
    4 |     (if true { array_a } else { array_b })[0] = 999
      |                                 ~~~~~~~
    5 |     println(array_a)
    6 | }