Unresolved import with external module in name resolution 2.0

[CohenArthur]

with the following project structure:

test/
    - lib.rs
    - foo.rs

and the following file content

// test/lib.rs
mod foo;

use foo::Foo;

// test/foo.rs
pub struct Foo;

we get the following error:

~/G/r/gccrs (master|✚1) [1] $ build/gcc/crab1 test/lib.rs -frust-name-resolution-2.0
test/lib.rs:3:10: error: unresolved import ‘foo::Foo’ [E0433]
    3 | use foo::Foo;
      |          ^~~

name resolution 1.0 and rustc do not emit any errors