Not sure what this error is about about exa HOT 8 CLOSED

exa(master)$ cargo update
    Updating registry `https://github.com/rust-lang/crates.io-index`
exa(master)$ cargo build --verbose
       Fresh pkg-config v0.1.7
       Fresh pad v0.1.2
       Fresh number_prefix v0.2.3
       Fresh matches v0.1.2
       Fresh bitflags v0.1.1
       Fresh locale v0.1.3
       Fresh gcc v0.2.1
       Fresh libc v0.1.2
       Fresh ansi_term v0.5.0
       Fresh log v0.2.4
       Fresh natord v1.0.7
   Compiling rustc-serialize v0.2.15
     Running `rustc /Users/yo1/.cargo/registry/src/github.com-1ecc6299db9ec823/rustc-serialize-0.2.15/src/lib.rs --crate-name rustc-serialize --crate-type lib -g -C metadata=ebc743271f9255aa -C extra-filename=-ebc743271f9255aa --out-dir /private/tmp/exa/target/deps --emit=dep-info,link -L dependency=/private/tmp/exa/target/deps -L dependency=/private/tmp/exa/target/deps -Awarnings`
   Compiling regex v0.1.15
     Running `rustc /Users/yo1/.cargo/registry/src/github.com-1ecc6299db9ec823/regex-0.1.15/src/lib.rs --crate-name regex --crate-type lib -g -C metadata=2796c106c9344244 -C extra-filename=-2796c106c9344244 --out-dir /private/tmp/exa/target/deps --emit=dep-info,link -L dependency=/private/tmp/exa/target/deps -L dependency=/private/tmp/exa/target/deps -Awarnings`
       Fresh pkg-config v0.2.2
       Fresh users v0.2.3
       Fresh getopts v0.2.4
       Fresh libz-sys v0.1.0
   Compiling libssh2-sys v0.1.8
     Running `/private/tmp/exa/target/build/libssh2-sys-207fdfe7cc83e73b/build-script-build`
   Compiling openssl-sys v0.4.3
     Running `rustc /Users/yo1/.cargo/registry/src/github.com-1ecc6299db9ec823/openssl-sys-0.4.3/src/lib.rs --crate-name openssl-sys --crate-type lib -g -C metadata=26edf94d95ec3590 -C extra-filename=-26edf94d95ec3590 --out-dir /private/tmp/exa/target/deps --emit=dep-info,link -L dependency=/private/tmp/exa/target/deps -L dependency=/private/tmp/exa/target/deps -Awarnings -L native=/usr/lib -L native=/private/tmp/exa/target/build/openssl-sys-26edf94d95ec3590/out -l ssl -l crypto -l z -l static=old_openssl_shim`
/Users/yo1/.cargo/registry/src/github.com-1ecc6299db9ec823/regex-0.1.15/src/re.rs:582:58: 582:70 error: wrong number of type arguments: expected 2, found 1 [E0243]
/Users/yo1/.cargo/registry/src/github.com-1ecc6299db9ec823/regex-0.1.15/src/re.rs:582     fn reg_replace<'a>(&'a mut self, caps: &Captures) -> Cow<'a, str>;
                                                                                                                                               ^~~~~~~~~~~~
Build failed, waiting for other jobs to finish...
/Users/yo1/.cargo/registry/src/github.com-1ecc6299db9ec823/rustc-serialize-0.2.15/src/collection_impls.rs:17:24: 17:34 error: unresolved import `std::collections::LinkedList`. There is no `LinkedList` in `std::collections`
/Users/yo1/.cargo/registry/src/github.com-1ecc6299db9ec823/rustc-serialize-0.2.15/src/collection_impls.rs:17 use std::collections::{LinkedList, VecDeque, BTreeMap, BTreeSet, HashMap, HashSet, VecMap};
                                                                                                                                    ^~~~~~~~~~
/Users/yo1/.cargo/registry/src/github.com-1ecc6299db9ec823/rustc-serialize-0.2.15/src/collection_impls.rs:17:36: 17:44 error: unresolved import `std::collections::VecDeque`. There is no `VecDeque` in `std::collections`
/Users/yo1/.cargo/registry/src/github.com-1ecc6299db9ec823/rustc-serialize-0.2.15/src/collection_impls.rs:17 use std::collections::{LinkedList, VecDeque, BTreeMap, BTreeSet, HashMap, HashSet, VecMap};
                                                                                                                                                ^~~~~~~~
error: aborting due to 2 previous errors
Could not compile `regex`.

Caused by:
  Process didn't exit successfully: `rustc /Users/yo1/.cargo/registry/src/github.com-1ecc6299db9ec823/regex-0.1.15/src/lib.rs --crate-name regex --crate-type lib -g -C metadata=2796c106c9344244 -C extra-filename=-2796c106c9344244 --out-dir /private/tmp/exa/target/deps --emit=dep-info,link -L dependency=/private/tmp/exa/target/deps -L dependency=/private/tmp/exa/target/deps -Awarnings` (status=101)
exa(master)$