cpu went to 100% while opening rs files with nightly edition

accidentally raise in wrong place before.

cargo-features = ["edition2021"]

[package]
name = "rest_api"
version = "0.1.0"
authors = ["Hall Dong <Hall Dong>"]
edition = "2021"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]
rocket = "0.4.4"
rocket_codegen = "0.4.4"
diesel = { version = "1.4.0", features = ["postgres"] }
dotenv = "0.9.0"
r2d2-diesel = "1.0"
r2d2 = "0.8"
serde = "1.0"
serde_derive = "1.0"
serde_json = "1.0"
custom_derive ="0.1.7"
[dependencies.rocket_contrib]
version = "*"
default-features = false
features = ["json"]

fn main() {
    println!("Hello, world!");
}

This occurs even rustup override set nightly had been executed.

user@host ~/l/rest_api (master)# rustup override set nightly
info: using existing install for 'nightly-x86_64-unknown-linux-gnu'
info: override toolchain for '/user/learn/rest_api' set to 'nightly-x86_64-unknown-linux-gnu'
  nightly-x86_64-unknown-linux-gnu unchanged - rustc 1.54.0-nightly (f58631b45 2021-05-28)

user@host ~/l/rest_api (master)# vim -p src/main.rs Cargo.toml
2 files to edit

[coc.nvim] rust-analyzer failed to load workspace: Failed to read Cargo metadata from Cargo.
toml file /user/learn/learn6/Cargo.toml, cargo 1.54.0-nightly (e931e4796 2021-05-24): Failed
 to run `cargo metadata --manifest-path /user/learn/learn6/Cargo.toml` in `/user/learn/learn
6`: `cargo metadata` exited with an error: error: failed to parse manifest at `/user/learn/l
earn6/Cargo.toml`
Caused by:
  the cargo feature `edition2021` requires a nightly version of Cargo, but this is the `stab
le` channel
  See https://doc.rust-lang.org/book/appendix-07-nightly-rust.html for more information abou
t Rust release channels.
  See https://doc.rust-lang.org/cargo/reference/unstable.html#edition-2021 for more informat
ion about using this feature.
Press ENTER or type command to continue

...
[coc.nvim] rust-analyzer failed to start, run ':CocCommand rust-analyzer.reloadWorkspace' to reload

nothing goes better after doing so.

[fannheyward]

It’s rust-analyzer’s issue, the language server runs more CPU/mem, coc/coc-rust-analyzer just clients.

[ghost]

@fannheyward very clear explanation. thanks!