gistfile1.txt

hello_world git:(upstream ⚡ detached@a4dcb0c) ₹ rustup default nightly
info: using existing install for 'nightly-x86_64-apple-darwin'
info: default toolchain set to 'nightly-x86_64-apple-darwin'

  nightly-x86_64-apple-darwin unchanged - rustc 1.33.0-nightly (7bac68a5d 2019-01-21)

hello_world git:(upstream ⚡ detached@a4dcb0c) ₹ cargo +nightly build
error: no such subcommand: `+nightly`
hello_world git:(upstream ⚡ detached@a4dcb0c) ₹ cargo run
warning: Rocket was unable to check rustc compatibility.
warning: Build may fail due to incompatible rustc version.
warning: Rocket was unable to check rustc compatibility.
warning: Build may fail due to incompatible rustc version.
   Compiling cookie v0.11.0
   Compiling hyper v0.10.15
   Compiling pear_codegen v0.1.2
   Compiling devise_core v0.2.0
error[E0554]: #![feature] may not be used on the stable release channel
 --> /Users/vijay/.cargo/registry/src/github.com-1ecc6299db9ec823/pear_codegen-0.1.2/src/lib.rs:1:1
  |
1 | #![feature(crate_visibility_modifier)]
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^