my_lib.rs

use types::{MyType, MyOtherType};
mod types;

my_lib_warnings

C:\import_resolve_bug\lib>rustc --lib my_lib.rs

my_lib.rs:1:20: 1:32 warning: unused import
my_lib.rs:1 use types::{MyType, MyOtherType};
                                ^~~~~~~~~~~~
my_lib.rs:1:12: 1:19 warning: unused import
my_lib.rs:1 use types::{MyType, MyOtherType};
                        ^~~~~~~
warning: missing crate link meta `name`, using `my_lib` as default
warning: missing crate link meta `vers`, using `0.0` as default

test_my_lib.rs

mod my_lib;

#[test]
fn test_something_neat() {
	assert!(true);
}

test_my_lib_errors

C:\import_resolve_bug\lib>rustc --test test_my_lib.rs

my_lib.rs:1:12: 1:19 error: unresolved name
my_lib.rs:1 use types::{MyType, MyOtherType};
                        ^~~~~~~
my_lib.rs:1:12: 1:19 error: failed to resolve import: types::MyType
my_lib.rs:1 use types::{MyType, MyOtherType};
                        ^~~~~~~
my_lib.rs:1:20: 1:32 error: unresolved name
my_lib.rs:1 use types::{MyType, MyOtherType};
                                ^~~~~~~~~~~~
my_lib.rs:1:20: 1:32 error: failed to resolve import: types::MyOtherType
my_lib.rs:1 use types::{MyType, MyOtherType};
                                ^~~~~~~~~~~~
error: failed to resolve imports
error: aborting due to 5 previous errors

types.rs

pub type MyType = int;
pub type MyOtherType = int;