unused imports not all detected

[bfops]

Sorry, I don't have a minimal repro.

The following commit (I believe) has all unused imports removed: bfops/playform@c4f7351.

However, applying the following patch still builds fine, with no unused import warnings or errors:

diff --git a/Cargo.toml b/Cargo.toml
index 3e6910f..2b32761 100755
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -19,6 +19,9 @@ git = "https://github.com/bjz/gl-rs"
[dependencies.sdl2_game_window]
git = "https://github.com/bfops/sdl2_game_window"

+[dependencies.cgmath]
+git = "https://github.com/bjz/cgmath-rs"
+
[dependencies.piston]
git = "https://github.com/PistonDevelopers/piston"

diff --git a/src/glw.rs b/src/glw.rs
index 56bcd4d..54ae3aa 100644
--- a/src/glw.rs
+++ b/src/glw.rs
@@ -4,6 +4,7 @@
//! GLW stands for "OpenGL wrapper".
+#[deny(unused_imports)]
pub use color::Color4;
+pub use cgmath::matrix::Matrix4;
use cstr_cache;
use libc::types::common::c95;
use nalgebra::na::{Mat3, Mat4, Vec3, Eye, Outer};
diff --git a/src/playform.rs b/src/playform.rs
index c2ef41b..05de4a2 100644
--- a/src/playform.rs
+++ b/src/playform.rs
@@ -10,6 +10,7 @@
// to disable warnings only in a macro.
#![allow(unused_unsafe)]

+extern crate cgmath;
extern crate gl;
extern crate libc;
extern crate nalgebra;

rustc 0.12.0-pre-nightly (25741603f 2014-08-03 23:46:10 +0000)

[alexcrichton]

The only import you've added here is a pub use which are all whitelisted for unused imports. Is there another specific import you're thinking this should have warned about?

[bfops]

Oh, you're right. I guess I was expecting that something like this would generate at least a warning:

pub use std::cmp;

pub struct Vec3;

pub fn foo() {}

pub fn main() {
}

Especially since this does:

mod test;

pub fn main() {
}

test.rs:

pub fn foo () {}

[alexcrichton]

Ok, in that case I'm going to close this as intended. Resolve doesn't currently warn about any pub use imports as it's undecided whether they're used because they could later be used by future crates for example.