Unable to build in stable (beta) channel

[callahad]

Per src/lib.rs#L11:

#![feature(fs, fs_time, fs_ext)]

Things that fail without the feature flags:

$ cargo build
   Compiling tar v0.2.9 (file:///Users/dan/Projects/Tracking/tar-rs)
src/lib.rs:177:22: 177:41 error: use of unstable library feature 'fs': a more granual ability to set specific permissions may be exposed on the Permissions structure itself and this method may not always exist
src/lib.rs:177                 try!(fs::set_permissions(&dst, perm));
                                    ^~~~~~~~~~~~~~~~~~~
<std macros>:1:1: 6:48 note: in expansion of try!
src/lib.rs:177:17: 177:55 note: expansion site
src/lib.rs:177:41: 177:41 help: add #![feature(fs)] to the crate attributes to enable
<std macros>:1:1: 6:48 note: in expansion of try!
src/lib.rs:177:17: 177:55 note: expansion site
src/lib.rs:185:18: 185:32 error: use of unstable library feature 'fs_ext': may want a more useful mode abstraction
src/lib.rs:185             perm.set_mode(mode);
                                ^~~~~~~~~~~~~~
src/lib.rs:185:32: 185:32 help: add #![feature(fs_ext)] to the crate attributes to enable
src/lib.rs:307:39: 307:49 error: use of unstable library feature 'fs_time': the return type of u64 is not quite appropriate for this method and may change if the standard library gains a type to represent a moment in time
src/lib.rs:307         octal(&mut header.mtime, stat.modified() / 1000);
                                                     ^~~~~~~~~~
src/lib.rs:307:49: 307:49 help: add #![feature(fs_time)] to the crate attributes to enable
src/lib.rs:360:32: 360:38 error: use of unstable library feature 'fs_ext': may want a more useful mode abstraction
src/lib.rs:360             meta.permissions().mode()
                                              ^~~~~~
src/lib.rs:360:38: 360:38 help: add #![feature(fs_ext)] to the crate attributes to enable
error: aborting due to 4 previous errors
Could not compile `tar`.

[alexcrichton]

This is correct! Unfortunately these are all required for tarball creation/unpacking to work properly, so this library will have to wait for these apis to stabilize to run on beta. I hope to write an RFC quite soon about these apis though to get them onto the stable channel ASAP!

[indykish]

@alexcrichton Is there a fix for this problem ? The cargo itself can't be compiled as it depends on tar

[alexcrichton]

@indykish unfortunately not yet, this library will be able to compile on stable once rust-lang/rfcs#1044 lands. Cargo is also unfortunately blocked on stable by catch_panic in git2-rs