Warning when compiling

[szagi3891]

grzegorz@grzegorz:~/Pulpit/rust$ git clone https://github.com/nix-rust/nix
Cloning into 'nix'...
remote: Counting objects: 2904, done.
remote: Total 2904 (delta 0), reused 0 (delta 0), pack-reused 2904
Receiving objects: 100% (2904/2904), 751.82 KiB | 214.00 KiB/s, done.
Resolving deltas: 100% (2043/2043), done.
Checking connectivity... done.
grzegorz@grzegorz:~/Pulpit/rust/nix$ cargo build
    Updating registry `https://github.com/rust-lang/crates.io-index`
 Downloading bitflags v0.4.0
 Downloading semver v0.1.20
 Downloading rustc_version v0.1.7
   Compiling libc v0.2.9
   Compiling semver v0.1.20
   Compiling rustc_version v0.1.7
   Compiling bitflags v0.4.0
   Compiling cfg-if v0.1.0
   Compiling nix v0.5.1-pre (file:///home/grzegorz/Pulpit/rust/nix)
src/sched.rs:208:20: 208:34 warning: `extern "C" fn(*mut Box<std::ops::FnMut() -> isize>) -> i32 {sched::clone::callback}` is now zero-sized and has to be cast to a pointer before transmuting to `*const extern "C" fn(*const Box<std::ops::FnMut() -> isize>) -> i32`, #[warn(transmute_from_fn_item_types)] on by default
src/sched.rs:208         ffi::clone(mem::transmute(callback), ptr as *mut c_void, flags.bits(), &mut cb)
                                    ^~~~~~~~~~~~~~
src/sched.rs:208:20: 208:34 warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
src/sched.rs:208:20: 208:34 note: for more information, see issue #19925 <https://github.com/rust-lang/rust/issues/19925>
grzegorz@grzegorz:~/Pulpit/rust/nix$

can you fix it?

[posborne]

@szagi3891 What version of rustc?

[fiveop]

This is the relevant Rust issue: rust-lang/rust#19925 .

[szagi3891]

It is the latest version. Today installed. Nightly (1.9)

gszeliga@dev4:~/workspace/nix$ cargo version
cargo 0.10.0-nightly (f20ca62 2016-04-06)

[kamalmarhubi]

Fixed by #353.

[szagi3891]

Cool :)