rc/main.rs:6     let mut glfw = glfw::init(glfw::FAIL_ON_ERRORS).unwrap();
                                                                  ^~~~~~~~
src/main.rs:11:5: 11:33 error: the type of this value must be known in this context
src/main.rs:11     window.set_key_polling(true);
                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
src/main.rs:12:26: 12:26 help: methods from traits can only be called if the trait is implemented and in scope; the following trait defines a method `make_current`, perhaps you need to implement it:
src/main.rs:12:26: 12:26 help: candidate #1: `glfw::Context`
error: aborting due to 2 previous errors
Could not compile `hello_world`.