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specify nightly required to install from source

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when using stable cargo install fails due to #![feature] usage:

    error[E0554]: #![feature] may not be used on the stable release channel
      --> /Users/dnw/.cargo/registry/src/github.com-1ecc6299db9ec823/rustc-ap-serialize-67.0.0/lib.rs:24:1
       |
    24 | #![feature(rustc_private, box_syntax)]
       | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    
    error[E0554]: #![feature] may not be used on the stable release channel
      --> /Users/dnw/.cargo/registry/src/github.com-1ecc6299db9ec823/rustc-ap-serialize-67.0.0/lib.rs:25:1
       |
    25 | #![feature(core_intrinsics)]
       | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    
    error[E0554]: #![feature] may not be used on the stable release channel
      --> /Users/dnw/.cargo/registry/src/github.com-1ecc6299db9ec823/rustc-ap-serialize-67.0.0/lib.rs:26:1
       |
    26 | #![feature(i128_type)]
       | ^^^^^^^^^^^^^^^^^^^^^^
    
    error[E0554]: #![feature] may not be used on the stable release channel
      --> /Users/dnw/.cargo/registry/src/github.com-1ecc6299db9ec823/rustc-ap-serialize-67.0.0/lib.rs:27:1
       |
    27 | #![feature(specialization)]
       | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
    
    error: aborting due to 4 previous errors
    
    error: Could not compile `rustc-ap-serialize`.
    warning: build failed, waiting for other jobs to finish...
    error: failed to compile `rustfmt-nightly v0.4.1 (file:///d/rustfmt)`, intermediate artifacts can be found at `/d/rustfmt/target`
This commit is contained in:
Dale Wijnand 2018-04-09 22:54:17 +01:00 committed by GitHub
parent e784712f09
commit 8331197b7b
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README.md
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@ -87,9 +87,9 @@ rustup component add rustfmt-preview
## Installing from source ## Installing from source
To install from source, first checkout to the tag or branch you want to install, then issue To install from source (nightly required), first checkout to the tag or branch you want to install, then issue
``` ```
cargo install --path . cargo install --path .
``` ```
This will install `rustfmt` in your `~/.cargo/bin`. Make sure to add `~/.cargo/bin` directory to This will install `rustfmt` in your `~/.cargo/bin`. Make sure to add `~/.cargo/bin` directory to