[Pkg-rust-maintainers] Bug#796256: Please consider packaging a Rust version that allows #![feature(...)]

[Josh Triplett]

Package: rustc
Version: 1.2.0+dfsg1-1
Severity: wishlist

Quite a bit of the Cargo ecosystem makes use of #![feature(...)] to
enable unstable features.  Rust release builds prohibit this by default:

/home/josh/.cargo/git/checkouts/rust-fuse-e03750e721e8762f/master/src/lib.rs:12:1: 12:18 error: #[feature] may not be used on the stable release channel
/home/josh/.cargo/git/checkouts/rust-fuse-e03750e721e8762f/master/src/lib.rs:12 #![feature(libc)]
                                                                                ^~~~~~~~~~~~~~~~~

Please consider providing a package of rustc that allows these feature-gates.
(That doesn't necessarily have to be a nightly version.)

- Josh Triplett

-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 4.1.0-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages rustc depends on:
ii  libc6            2.19-19
ii  libstd-rust-dev  1.2.0+dfsg1-1

Versions of packages rustc recommends:
pn  rust-gdb | rust-lldb  <none>

Versions of packages rustc suggests:
pn  rust-doc  <none>

-- no debconf information