vlib/v/checker/tests/map_init_wrong_type.vv:3:10: error: cannot assign `map[string]f64` to `a` of type `map[string]f32`
    1 | fn main() {
    2 |    mut a := map[string]f32{}
    3 |    a = { 'x': 12.3 }
      |          ~~~
    4 | }
