type &[u8] does not implement any method in scope named slice

[dtantsur]

recent build is failing with

/home/dtantsur/Projects/num/src/complex.rs:222:5: 222:40 warning: The use of cfg filters in #[ignore] is deprecated. Use #[cfg_attr(<cfg pattern>, ignore)] instead.
/home/dtantsur/Projects/num/src/complex.rs:222     #[ignore(cfg(target_arch = "x86"))]
                                                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/home/dtantsur/Projects/num/src/bigint.rs:736:41: 736:58 error: type `&[u8]` does not implement any method in scope named `slice`
/home/dtantsur/Projects/num/src/bigint.rs:736             match uint::parse_bytes(buf.slice(start, end), radix) {
                                                                                      ^~~~~~~~~~~~~~~~~
/home/dtantsur/Projects/num/src/bigint.rs:1407:41: 1407:64 error: type `&[u8]` does not implement any method in scope named `slice`
/home/dtantsur/Projects/num/src/bigint.rs:1407         return BigUint::parse_bytes(buf.slice(start, buf.len()), radix)
                                                                                       ^~~~~~~~~~~~~~~~~~~~~~~

[alexcrichton]

This was actually fixed in rust-lang/rust#17715, and it just needs to hit the next nightly now. I've kicked of some builds, and they should be updated soon!