Build Failing with Cargo Nightly

[SFzxc]

I am getting the following error when running cargo +nightly install racer:

   Compiling rustc-ap-rustc_data_structures v686.0.0
error[E0107]: wrong number of type arguments: expected 2, found 1
   --> /Users/tobi/.cargo/registry/src/github.1485827954.workers.dev-1ecc6299db9ec823/rustc-ap-rustc_data_structures-686.0.0/src/graph/iterate/mod.rs:256:10
    |
256 |     ) -> ControlFlow<Self::BreakVal> {
    |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected 2 type arguments

error[E0107]: wrong number of type arguments: expected 2, found 1
   --> /Users/tobi/.cargo/registry/src/github.1485827954.workers.dev-1ecc6299db9ec823/rustc-ap-rustc_data_structures-686.0.0/src/graph/iterate/mod.rs:261:51
    |
261 |     fn node_settled(&mut self, _node: G::Node) -> ControlFlow<Self::BreakVal> {
    |                                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected 2 type arguments

error[E0107]: wrong number of type arguments: expected 2, found 1
   --> /Users/tobi/.cargo/registry/src/github.1485827954.workers.dev-1ecc6299db9ec823/rustc-ap-rustc_data_structures-686.0.0/src/graph/iterate/mod.rs:284:10
    |
284 |     ) -> ControlFlow<Self::BreakVal> {
    |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected 2 type arguments

error: aborting due to 3 previous errors

For more information about this error, try `rustc --explain E0107`.
error: could not compile `rustc-ap-rustc_data_structures`

To learn more, run the command again with --verbose.
warning: build failed, waiting for other jobs to finish...
error: failed to compile `racer v2.1.40`, intermediate artifacts can be found at `/var/folders/sw/jmc9rg0n17v550p30c7_wqmr0000gp/T/cargo-install8jfGll`

Caused by:
  build failed

MacOs:

rustup 1.22.1 (b01adbbc3 2020-07-08)
rustc 1.49.0-nightly (ffa2e7ae8 2020-10-24)
cargo 1.49.0-nightly (dd83ae55c 2020-10-20)

Thanks

[w01fb0ss]

me too

[math715]

me too
opensuse 15.2
rustup 1.22.1 (b01adbbc3 2020-07-08)
rustc 1.49.0-nightly (ffa2e7ae8 2020-10-24)
cargo 1.49.0-nightly (dd83ae55c 2020-10-20)

[yiyoascen]

me too, on popOs 20

[nlopes]

If you do rustup update --force (this may mean you don't get all the components you have already installed) you should get a more up-to-date nightly (say 2020-10-31).

That one should build racer just fine.

This problem seems to be due to rust-ap-rustc_data_structures having been released on a newer rust src than what you have available in your rustup.

[SFzxc]

Thanks, @nlopes. I just checked, your temporary solution works fine!

[x10an14]

Can confirm that @nlopes' suggestion works for me too! Thanks! =D

[yiyoascen]

Yes ty for @nlopes suggestion! Rust really has a friendly community

[voland62]

@nlopes advise works.

[Aganthor]

I can confirm that the solution works.

[saehun]

same here

[Polensky]

I have tried @nlopes' suggestion but i still get errors when building racer.

rustup 1.23.0 (00924c9ba 2020-11-27)
rustc 1.50.0-nightly (6a889570e 2020-11-27)
cargo 1.50.0-nightly (bfca1cd22 2020-11-24)

Error when running cargo +nightly install racer:

   Compiling rustc-ap-rustc_data_structures v686.0.0
error[E0557]: feature has been removed
  --> /home/polensky/.cargo/registry/src/github.1485827954.workers.dev-1ecc6299db9ec823/rustc-ap-rustc_data_structures-686.0.0/src/lib.rs:18:12
   |
18 | #![feature(optin_builtin_traits)]
   |            ^^^^^^^^^^^^^^^^^^^^ feature has been removed
   |
   = note: renamed to `auto_traits`

error[E0658]: auto traits are experimental and possibly buggy
  --> /home/polensky/.cargo/registry/src/github.1485827954.workers.dev-1ecc6299db9ec823/rustc-ap-rustc_data_structures-686.0.0/src/sync.rs:30:9
   |
30 |         pub auto trait Send {}
   |         ^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: see issue #13231 <https://github.com/rust-lang/rust/issues/13231> for more information
   = help: add `#![feature(auto_traits)]` to the crate attributes to enable

error[E0658]: auto traits are experimental and possibly buggy
  --> /home/polensky/.cargo/registry/src/github.1485827954.workers.dev-1ecc6299db9ec823/rustc-ap-rustc_data_structures-686.0.0/src/sync.rs:31:9
   |
31 |         pub auto trait Sync {}
   |         ^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: see issue #13231 <https://github.com/rust-lang/rust/issues/13231> for more information
   = help: add `#![feature(auto_traits)]` to the crate attributes to enable

error: aborting due to 3 previous errors

Some errors have detailed explanations: E0557, E0658.
For more information about an error, try `rustc --explain E0557`.
error: could not compile `rustc-ap-rustc_data_structures`

To learn more, run the command again with --verbose.
warning: build failed, waiting for other jobs to finish...
error: failed to compile `racer v2.1.40`, intermediate artifacts can be found at `/tmp/cargo-installN6A2q8`

Caused by:
  build failed

[fx-kirin]

I think you just need to build it from the latest master.

[Polensky]

I think you just need to build it from the latest master.

I thought the command cargo +nightly install racer was doing that. I can see the version 2.1.40 in the output which match the latest release on the GitHub page.