Rustc hangs indefinitely when a dependent crate recursively exports one of its modules #33776
Description
If you do this in a lib.rs in crate a:
pub mod module;
and then you do this in a module.rs in the same crate:
pub use module;
and then you use the crate a in a crate b then rustc will hang indefinitely during the compilation.
Steps to reproduce
cargo new a
cargo new --bin b
echo 'pub mod module;' > a/src/lib.rs
echo 'pub use module;' > a/src/module.rs
echo '[dependencies.a]' >> b/Cargo.toml
echo 'path = "../a"' >> b/Cargo.toml
echo 'extern crate a;' >> b/src/main.rs
echo 'struct Instance { x: a::A }' >> b/src/main.rs
cd b
cargo build
Meta
rustc 1.10.0-nightly (179539f 2016-05-20)
host: x86_64-unknown-linux-gnu