Linking error between Rust crates

[tomaka]

How to reproduce:

1 - Clone the branch rustc-bug of https://github.com/tomaka/spine-rs
2 - Run cargo test

I get the following linking error with 32bits MinGW (rustc 1.5.0-nightly (20a6938c0 2015-10-16)) when the tests are linked:

note: D:\Projets\spine-rs\target\debug\test-f0708a7cba5cf230.0.o: In function `ZN4test4testE':
D:\Projets\spine-rs/tests/test.rs:11: undefined reference to `skeleton::animation::_$LT$impl$GT$::interpolate::h1389f3fa921899f7Y7b'

Everything is 100% pure safe Rust, so this linking error is clearly a bug.

I don't have time right now to find out precisely what causes it. Calling other functions from SkinAnimation also triggers the linking error. But for example if you only call spine::Skeleton::from_reader (which is another function from that same crate), then you don't get any error.

[tomaka]

I just tried and got the same linking error on linux.

[alexcrichton]

I believe this is a duplicate of #16734, so closing in favor of that, but thanks for the report!

If you add a pub use to the top of the crate of SkinAnimation it'll at least paper over the problem for now!

[tafia]

Thanks!