RFC#3416 failing

[amab8901]

rust-analyzer version:
rust-analyzer version: 0.3.2070-standalone [/home/user/.vscode-oss/extensions/rust-lang.rust-analyzer-0.3.2070-linux-x64/server/rust-analyzer]

rustc version:
rustc 1.80.1 (3f5fd8dd4 2024-08-06)

editor or extension:
VSCode, [email protected]

code snippet to reproduce:

Literally just create a blank project and copy-paste the following in Cargo.toml:

[features]
foo = { enables = [] }

It should work according to this RFC.

But instead it produces this error:

2024-08-17T18:58:44.397863Z ERROR Flycheck failed to run the following command: CommandHandle { program: "/home/user/.cargo/bin/cargo", arguments: ["check", "--workspace", "--message-format=json-diagnostic-rendered-ansi", "--manifest-path", "/home/user/src/nice/Cargo.toml", "--keep-going", "--all-targets"], current_dir: Some("/home/user/src/nice") }, error=Cargo watcher failed, the command produced no valid metadata (exit code: ExitStatus(unix_wait_status(25856))):
error: invalid type: map, expected a sequence
  --> Cargo.toml:10:7
   |
10 | foo = { enables = [] }
   |       ^^^^^^^^^^^^^^^^
   |

[lnicola]

Is that really implemented? cargo check seems to reject it.

Just because an RFC is accepted, it doesn't mean it's implemented and stabilized.

[amab8901]

oh! yeah makes sense. I realized it's not implemented.