Forward declared structures fail type resolution

[philberty]

I tried this code:

union B {
    a: A,
    b: f32
}

struct A {
    data: i32,
    len: usize,
}

I expected to see this happen: compile without error

Instead, this happened:

<source>:2:8: error: failed to lookup HIR 16 for node 'A'
    2 |     a: A,
      |        ^

see: https://godbolt.org/z/jY4bEWK3z

Meta

• What version of Rust GCC were you using, git sha if possible. b82408f

[philberty]

This has been a known bug for a while for myself but to fix it should be a fairly nice cleanup exercise we have all the code required to handle this now.