vlib/v/checker/tests/undefined_ident_in_ref_selector.vv:6:10: error: undefined ident: `line`
    4 | 
    5 | fn read() int {
    6 |     return &line.len
      |             ~~~~
    7 | }
vlib/v/checker/tests/undefined_ident_in_ref_selector.vv:6:15: error: `line` does not return a value
    4 | 
    5 | fn read() int {
    6 |     return &line.len
      |                  ~~~
    7 | }
vlib/v/checker/tests/undefined_ident_in_ref_selector.vv:6:9: error: cannot use `void` as type `int` in return argument
    4 | 
    5 | fn read() int {
    6 |     return &line.len
      |            ^
    7 | }
vlib/v/checker/tests/undefined_ident_in_ref_selector.vv:6:9: error: fn `read` expects you to return a non reference type `int`, but you are returning `void` instead
    4 | 
    5 | fn read() int {
    6 |     return &line.len
      |            ^
    7 | }
Details: use `return *pointer` instead of `return pointer`, and just `return value` instead of `return &value`