Compile errors with latest rust

[burtonageo]

With my current rustc version (0.13.0-dev (c56e59c72 2014-12-09 07:51:52 +0000)), there are multiple compile errors when building Semver, all of which are due to moving values from &-pointers

[burtonageo]

Compiling semver v0.1.3 (file:///Users/georgeburton/Downloads/semver)
/Users/georgeburton/Downloads/semver/src/version_req.rs:238:19: 238:23 error: cannot move out of dereference of `&`-pointer
/Users/georgeburton/Downloads/semver/src/version_req.rs:238             Gt => self.is_greater(ver),
                                                                              ^~~~
/Users/georgeburton/Downloads/semver/src/version_req.rs:239:43: 239:47 error: cannot move out of dereference of `&`-pointer
/Users/georgeburton/Downloads/semver/src/version_req.rs:239             GtEq => self.is_exact(ver) || self.is_greater(ver),
                                                                                                      ^~~~
/Users/georgeburton/Downloads/semver/src/version_req.rs:240:43: 240:47 error: cannot move out of dereference of `&`-pointer
/Users/georgeburton/Downloads/semver/src/version_req.rs:240             Lt => !self.is_exact(ver) && !self.is_greater(ver),
                                                                                                      ^~~~
/Users/georgeburton/Downloads/semver/src/version_req.rs:241:22: 241:26 error: cannot move out of dereference of `&`-pointer
/Users/georgeburton/Downloads/semver/src/version_req.rs:241             LtEq => !self.is_greater(ver),
                                                                                 ^~~~
/Users/georgeburton/Downloads/semver/src/version_req.rs:242:22: 242:26 error: cannot move out of dereference of `&`-pointer
/Users/georgeburton/Downloads/semver/src/version_req.rs:242             Tilde => self.matches_tilde(ver),
                                                                                 ^~~~
/Users/georgeburton/Downloads/semver/src/version_req.rs:243:27: 243:31 error: cannot move out of dereference of `&`-pointer
/Users/georgeburton/Downloads/semver/src/version_req.rs:243             Compatible => self.is_compatible(ver),
                                                                                      ^~~~
/Users/georgeburton/Downloads/semver/src/version_req.rs:244:28: 244:32 error: cannot move out of dereference of `&`-pointer
/Users/georgeburton/Downloads/semver/src/version_req.rs:244             Wildcard(_) => self.matches_wildcard(ver)
                                                                                       ^~~~
/Users/georgeburton/Downloads/semver/src/version_req.rs:422:24: 422:28 error: cannot move out of dereference of `&`-pointer
/Users/georgeburton/Downloads/semver/src/version_req.rs:422         let op = match self.op {
                                                                                   ^~~~
/Users/georgeburton/Downloads/semver/src/version_req.rs:423:18: 423:19 note: attempting to move value to here
/Users/georgeburton/Downloads/semver/src/version_req.rs:423             Some(x) => x,
                                                                             ^
/Users/georgeburton/Downloads/semver/src/version_req.rs:423:18: 423:19 help: to prevent the move, use `ref x` or `ref mut x` to capture value by reference
/Users/georgeburton/Downloads/semver/src/version_req.rs:423             Some(x) => x,
                                                                             ^
/Users/georgeburton/Downloads/semver/src/version_req.rs:522:31: 522:35 error: cannot move out of dereference of `&mut`-pointer
/Users/georgeburton/Downloads/semver/src/version_req.rs:522                       let s = self.state;
                                                                                          ^~~~
/Users/georgeburton/Downloads/semver/src/version_req.rs:514:9: 528:20 note: in expansion of next!
/Users/georgeburton/Downloads/semver/src/version_req.rs:538:13: 538:21 note: expansion site
/Users/georgeburton/Downloads/semver/src/version_req.rs:522:27: 522:28 note: attempting to move value to here
/Users/georgeburton/Downloads/semver/src/version_req.rs:522                       let s = self.state;
                                                                                      ^
/Users/georgeburton/Downloads/semver/src/version_req.rs:514:9: 528:20 note: in expansion of next!
/Users/georgeburton/Downloads/semver/src/version_req.rs:538:13: 538:21 note: expansion site
/Users/georgeburton/Downloads/semver/src/version_req.rs:522:27: 522:28 help: to prevent the move, use `ref s` or `ref mut s` to capture value by reference
/Users/georgeburton/Downloads/semver/src/version_req.rs:522                       let s = self.state;
                                                                                      ^
/Users/georgeburton/Downloads/semver/src/version_req.rs:514:9: 528:20 note: in expansion of next!
/Users/georgeburton/Downloads/semver/src/version_req.rs:538:13: 538:21 note: expansion site
/Users/georgeburton/Downloads/semver/src/version_req.rs:522:31: 522:35 error: cannot move out of dereference of `&mut`-pointer
/Users/georgeburton/Downloads/semver/src/version_req.rs:522                       let s = self.state;
                                                                                          ^~~~
/Users/georgeburton/Downloads/semver/src/version_req.rs:514:9: 528:20 note: in expansion of next!
/Users/georgeburton/Downloads/semver/src/version_req.rs:548:25: 548:33 note: expansion site
/Users/georgeburton/Downloads/semver/src/version_req.rs:522:27: 522:28 note: attempting to move value to here
/Users/georgeburton/Downloads/semver/src/version_req.rs:522                       let s = self.state;
                                                                                      ^
/Users/georgeburton/Downloads/semver/src/version_req.rs:514:9: 528:20 note: in expansion of next!
/Users/georgeburton/Downloads/semver/src/version_req.rs:548:25: 548:33 note: expansion site
/Users/georgeburton/Downloads/semver/src/version_req.rs:522:27: 522:28 help: to prevent the move, use `ref s` or `ref mut s` to capture value by reference
/Users/georgeburton/Downloads/semver/src/version_req.rs:522                       let s = self.state;
                                                                                      ^
/Users/georgeburton/Downloads/semver/src/version_req.rs:514:9: 528:20 note: in expansion of next!
/Users/georgeburton/Downloads/semver/src/version_req.rs:548:25: 548:33 note: expansion site
/Users/georgeburton/Downloads/semver/src/version_req.rs:522:31: 522:35 error: cannot move out of dereference of `&mut`-pointer
/Users/georgeburton/Downloads/semver/src/version_req.rs:522                       let s = self.state;
                                                                                          ^~~~
/Users/georgeburton/Downloads/semver/src/version_req.rs:514:9: 528:20 note: in expansion of next!
/Users/georgeburton/Downloads/semver/src/version_req.rs:553:25: 553:33 note: expansion site
/Users/georgeburton/Downloads/semver/src/version_req.rs:522:27: 522:28 note: attempting to move value to here
/Users/georgeburton/Downloads/semver/src/version_req.rs:522                       let s = self.state;
                                                                                      ^
/Users/georgeburton/Downloads/semver/src/version_req.rs:514:9: 528:20 note: in expansion of next!
/Users/georgeburton/Downloads/semver/src/version_req.rs:553:25: 553:33 note: expansion site
/Users/georgeburton/Downloads/semver/src/version_req.rs:522:27: 522:28 help: to prevent the move, use `ref s` or `ref mut s` to capture value by reference
/Users/georgeburton/Downloads/semver/src/version_req.rs:522                       let s = self.state;
                                                                                      ^
/Users/georgeburton/Downloads/semver/src/version_req.rs:514:9: 528:20 note: in expansion of next!
/Users/georgeburton/Downloads/semver/src/version_req.rs:553:25: 553:33 note: expansion site
/Users/georgeburton/Downloads/semver/src/version_req.rs:522:31: 522:35 error: cannot move out of dereference of `&mut`-pointer
/Users/georgeburton/Downloads/semver/src/version_req.rs:522                       let s = self.state;
                                                                                          ^~~~
/Users/georgeburton/Downloads/semver/src/version_req.rs:514:9: 528:20 note: in expansion of next!
/Users/georgeburton/Downloads/semver/src/version_req.rs:558:25: 558:33 note: expansion site
/Users/georgeburton/Downloads/semver/src/version_req.rs:522:27: 522:28 note: attempting to move value to here
/Users/georgeburton/Downloads/semver/src/version_req.rs:522                       let s = self.state;
                                                                                      ^
/Users/georgeburton/Downloads/semver/src/version_req.rs:514:9: 528:20 note: in expansion of next!
/Users/georgeburton/Downloads/semver/src/version_req.rs:558:25: 558:33 note: expansion site
/Users/georgeburton/Downloads/semver/src/version_req.rs:522:27: 522:28 help: to prevent the move, use `ref s` or `ref mut s` to capture value by reference
/Users/georgeburton/Downloads/semver/src/version_req.rs:522                       let s = self.state;
                                                                                      ^
/Users/georgeburton/Downloads/semver/src/version_req.rs:514:9: 528:20 note: in expansion of next!
/Users/georgeburton/Downloads/semver/src/version_req.rs:558:25: 558:33 note: expansion site
/Users/georgeburton/Downloads/semver/src/version_req.rs:522:31: 522:35 error: cannot move out of dereference of `&mut`-pointer
/Users/georgeburton/Downloads/semver/src/version_req.rs:522                       let s = self.state;
                                                                                          ^~~~
/Users/georgeburton/Downloads/semver/src/version_req.rs:514:9: 528:20 note: in expansion of next!
/Users/georgeburton/Downloads/semver/src/version_req.rs:574:25: 574:33 note: expansion site
/Users/georgeburton/Downloads/semver/src/version_req.rs:522:27: 522:28 note: attempting to move value to here
/Users/georgeburton/Downloads/semver/src/version_req.rs:522                       let s = self.state;
                                                                                      ^
/Users/georgeburton/Downloads/semver/src/version_req.rs:514:9: 528:20 note: in expansion of next!
/Users/georgeburton/Downloads/semver/src/version_req.rs:574:25: 574:33 note: expansion site
/Users/georgeburton/Downloads/semver/src/version_req.rs:522:27: 522:28 help: to prevent the move, use `ref s` or `ref mut s` to capture value by reference
/Users/georgeburton/Downloads/semver/src/version_req.rs:522                       let s = self.state;
                                                                                      ^
/Users/georgeburton/Downloads/semver/src/version_req.rs:514:9: 528:20 note: in expansion of next!
/Users/georgeburton/Downloads/semver/src/version_req.rs:574:25: 574:33 note: expansion site
/Users/georgeburton/Downloads/semver/src/version_req.rs:522:31: 522:35 error: cannot move out of dereference of `&mut`-pointer
/Users/georgeburton/Downloads/semver/src/version_req.rs:522                       let s = self.state;
                                                                                          ^~~~
/Users/georgeburton/Downloads/semver/src/version_req.rs:514:9: 528:20 note: in expansion of next!
/Users/georgeburton/Downloads/semver/src/version_req.rs:582:25: 582:33 note: expansion site
/Users/georgeburton/Downloads/semver/src/version_req.rs:522:27: 522:28 note: attempting to move value to here
/Users/georgeburton/Downloads/semver/src/version_req.rs:522                       let s = self.state;
                                                                                      ^
/Users/georgeburton/Downloads/semver/src/version_req.rs:514:9: 528:20 note: in expansion of next!
/Users/georgeburton/Downloads/semver/src/version_req.rs:582:25: 582:33 note: expansion site
/Users/georgeburton/Downloads/semver/src/version_req.rs:522:27: 522:28 help: to prevent the move, use `ref s` or `ref mut s` to capture value by reference
/Users/georgeburton/Downloads/semver/src/version_req.rs:522                       let s = self.state;
                                                                                      ^
/Users/georgeburton/Downloads/semver/src/version_req.rs:514:9: 528:20 note: in expansion of next!
/Users/georgeburton/Downloads/semver/src/version_req.rs:582:25: 582:33 note: expansion site
error: aborting due to 14 previous errors
Could not compile `semver`.