Cannot run with custom build of RLS

[alexreg]

I've created a custom build of RLS and symlinked the rls binary into build/x86_64-apple-darwin/stage2/bin along with cargo (rustc is already built to there of course). I think created a toolchain from the stage2 directory using rustup. Next, in my workspace config in VSCode, I set "rust-client.channel": "local".

However, upon opening my VSCode workspace, I get error popups:

• Couldn't start client Rust Language Server
• Unexpected error initialising RLS - error running rustup

If I run code --verbose workspace from the command-line, I get the following telling error message:

[43383:0427/023404.567902:INFO:CONSOLE(260)] "%c[Extension Host] %cError: Command failed: rustup component list --toolchain local
error: toolchain 'local' does not support components
info: caused by: invalid toolchain name: 'local'

	at ChildProcess.exithandler (child_process.js:217:12)
	at emitTwo (events.js:106:13)
	at ChildProcess.emit (events.js:194:7)
	at maybeClose (internal/child_process.js:899:16)
	at Process.ChildProcess._handle.onexit (internal/child_process.js:226:5) %c(at /Users/alex/.vscode/extensions/rust-lang.rust-0.4.1/out/src/rustup.js:137:21)", source: file:///Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/workbench.main.js (260)

So the question is, how do I solve this? How can I build a toolchain that "supports components"?

[nrc]

You can use the hidden setting rls.path to specify the path to your RLS, that's the most reliable way to run a custom RLS. Sorry this ought to be documented. Let me know if you still have problems.

[alexreg]

@nrc, Yep, does the trick, thanks. rust-client.rlsPath seems to be the preferred property, but either works.

[shehzadaliqadri]

how to change path ?

[shehzadaliqadri]

Please solve this Issue:
raza@Raza-Ubuntu:~$ cargo install racer
Updating crates.io index
Installing racer v2.1.19
Compiling semver-parser v0.7.0
Compiling arrayvec v0.4.10
Compiling nodrop v0.1.13
Compiling cfg-if v0.1.7
Compiling libc v0.2.50
Compiling rand_core v0.4.0
Compiling lazy_static v1.3.0
Compiling memoffset v0.2.1
Compiling scopeguard v0.3.3
Compiling stable_deref_trait v1.1.1
Compiling byteorder v1.3.1
Compiling proc-macro2 v0.4.27
Compiling rustc-rayon-core v0.1.2
Compiling smallvec v0.6.9
Compiling rustc-rayon v0.1.2
error[E0554]: #![feature] may not be used on the stable release channel
--> /home/raza/.cargo/registry/src/gh.neting.cc-1ecc6299db9ec823/smallvec-0.6.9/lib.rs:33:32
|
33 | #![cfg_attr(feature = "union", feature(untagged_unions))]
| ^^^^^^^^^^^^^^^^^^^^^^^^

error[E0554]: #![feature] may not be used on the stable release channel
--> /home/raza/.cargo/registry/src/gh.neting.cc-1ecc6299db9ec823/smallvec-0.6.9/lib.rs:35:37
|
35 | #![cfg_attr(feature = "may_dangle", feature(dropck_eyepatch))]
| ^^^^^^^^^^^^^^^^^^^^^^^^

Compiling unicode-xid v0.1.0
Compiling bitflags v1.0.4
Compiling syn v0.15.29
error: aborting due to 2 previous errors

For more information about this error, try rustc --explain E0554.
error: Could not compile smallvec.
warning: build failed, waiting for other jobs to finish...
error: failed to compile racer v2.1.19, intermediate artifacts can be found at /tmp/cargo-installarnQai

Caused by:
build failed