Misconfigured rustup default-host error

[Seeker14491]

Version of VSCode: 1.13.1
Version of the extension: 0.4.0
OS: Windows 10

> rustup show
Default host: x86_64-pc-windows-gnu

nightly-x86_64-pc-windows-msvc (default)
rustc 1.20.0-nightly (445077963 2017-06-20)

Description: RLS stopped working for me. I get an error about the windows-gnu toolchain not being installed. I don't have it installed; I use the MSVCtoolchain.

I found the problem while writing this issue: The command

rustup set default-host x86_64-pc-windows-msvc

fixed the problem. I'm still posting, as I'm not sure this is correct behavior. It might trip up others, as I didn't even know about rustup's default-host command. I think the default-host should be ignored, unless perhaps the user has both GNU and MSVC nightly toolchains.

Output of the "Rust Language Server" channel:

error: toolchain 'nightly-x86_64-pc-windows-gnu' is not installed
[Error - 4:18:29 PM] Connection to server got closed. Server will not be restarted.

Output of the "Rust logging" channel:

DEBUG: Rustup: updateToolchains: this.toolchains=[{"channel":"nightly","host":"x86_64-pc-windows-msvc","isDefault":true}]
DEBUG: Rustup: updateComponents(nightly-x86_64-pc-windows-msvc): components=["cargo-x86_64-pc-windows-msvc (default)","rls-x86_64-pc-windows-msvc (installed)","rust-analysis-x86_64-pc-windows-msvc (installed)","rust-docs-x86_64-pc-windows-msvc (default)","rust-src","rust-std-aarch64-apple-ios","rust-std-aarch64-linux-android","rust-std-aarch64-unknown-fuchsia","rust-std-aarch64-unknown-linux-gnu","rust-std-arm-linux-androideabi","rust-std-arm-unknown-linux-gnueabi","rust-std-arm-unknown-linux-gnueabihf","rust-std-arm-unknown-linux-musleabi","rust-std-arm-unknown-linux-musleabihf","rust-std-armv7-apple-ios","rust-std-armv7-linux-androideabi","rust-std-armv7-unknown-linux-gnueabihf","rust-std-armv7-unknown-linux-musleabihf","rust-std-armv7s-apple-ios","rust-std-asmjs-unknown-emscripten","rust-std-i386-apple-ios","rust-std-i586-pc-windows-msvc","rust-std-i586-unknown-linux-gnu","rust-std-i686-apple-darwin","rust-std-i686-linux-android","rust-std-i686-pc-windows-gnu","rust-std-i686-pc-windows-msvc","rust-std-i686-unknown-freebsd","rust-std-i686-unknown-linux-gnu","rust-std-i686-unknown-linux-musl","rust-std-mips-unknown-linux-gnu","rust-std-mips-unknown-linux-musl","rust-std-mips64-unknown-linux-gnuabi64","rust-std-mips64el-unknown-linux-gnuabi64","rust-std-mipsel-unknown-linux-gnu","rust-std-mipsel-unknown-linux-musl","rust-std-powerpc-unknown-linux-gnu","rust-std-powerpc64-unknown-linux-gnu","rust-std-powerpc64le-unknown-linux-gnu","rust-std-s390x-unknown-linux-gnu","rust-std-sparc64-unknown-linux-gnu","rust-std-wasm32-unknown-emscripten","rust-std-x86_64-apple-darwin","rust-std-x86_64-apple-ios","rust-std-x86_64-linux-android","rust-std-x86_64-pc-windows-gnu","rust-std-x86_64-pc-windows-msvc (default)","rust-std-x86_64-rumprun-netbsd","rust-std-x86_64-unknown-freebsd","rust-std-x86_64-unknown-fuchsia","rust-std-x86_64-unknown-linux-gnu","rust-std-x86_64-unknown-linux-musl","rust-std-x86_64-unknown-netbsd","rustc-x86_64-pc-windows-msvc (default)",""]
DEBUG: activate: getNightlyToolchain: There is only one nightly toolchain
DEBUG: RlsMode: start: enter
DEBUG: Rustup: isRlsInstalled: getNightlyToolchain: There is only one nightly toolchain
DEBUG: RlsMode: start: User decided to use rustfmt
DEBUG: Rustup: isRlsInstalled: getNightlyToolchain: There is only one nightly toolchain
DEBUG: RlsMode: start: rlsPath=rustup 
DEBUG: RlsMode: start: env={} 
DEBUG: Rustup: isRlsInstalled: getNightlyToolchain: There is only one nightly toolchain
DEBUG: RlsMode: start: args=["run","nightly","rls"] 
DEBUG: RlsMode: start: revealOutputChannelOn=3 
DEBUG: RlsMode: start: Language Client Manager: start

Relevant settings.json settings:

"rust.mode": "rls",
"rust.rls": {
	"useRustfmt": true,
	"env": {
		"RUST_LOG": "rls=debug"
	}
},
"rust.rustup": {
	"toolchain": "nightly-x86_64-pc-windows-msvc"
}

[KalitaAlexey]

@Seeker14491,
It is going to be fixed when #280 will be fixed.