While executing : cargo +nightly install --git https://github.com/alexcrichton/wasm-gc --force in Ubuntu 18.04, is throwing
error: no such subcommand:
+nightly
My system has following nightly version
rustc 1.47.0-nightly
cargo 1.47.0-nightly install --git https://github.com/alexcrichton/wasm-gc --force
Even, above command throws similar error!
Cmd1 : rustup toolchain install nightly
Cmd2 : rustup update
Even after running these commands as suggested over communities, error isn't resolved. I'm new to rust & couldn't link cargo to installed nightly via rustup.
System Details
cargo version : 1.43.0
rustup version : 1.22.1 (b01adbbc3 2020-07-08)
Cmd 3:
which cargo : /usr/bin/cargo
which cargo printing out /usr/bin/cargo indicates that it defaults to Cargo that you installed from your OS's package manager (apt).
Invocations with the toolchain version like cargo +nightly are not a feature of Cargo, but rather Rustup. In fact, Rustup's cargo is a link to rustup that then invokes the "real" cargo stored under .rustup/toolchains.
The easiest way to solve this would be to uninstall the Cargo you obtained from Ubuntu repositories:
$ apt remove cargo
Otherwise, you could try to manipulate your PATH such that /home/<your_username>/.cargo/bin comes before /usr/bin.
If you do not have rustup installed yet, you need to install it.
$ brew install rustup-init # OSX
$ curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh # Ubuntu/Debian
Then configure rustup, you can set the config to default to start
$ rustup-init
Finally you can install specific version of rust, for instance nightly
$ rustup toolchain install nightly