warning: failed to automatically apply fixes suggested by rustc to crate `clpy` after fixes were automatically applied the compiler reported errors within these files: * src/main.rs This likely indicates a bug in either rustc or cargo itself, and we would appreciate a bug report! You're likely to see a number of compiler warnings after this message which cargo attempted to fix but failed. If you could open an issue at https://github.com/rust-lang/rust/issues quoting the full output of this command we'd be very appreciative! Note that you may be able to make some more progress in the near-term fixing code with the `--broken-code` flag The following errors were reported: error: expected expression, found `let` statement --> src/main.rs:5:3 | 5 | (let r = 5); | ^^^ error: `let` expressions are not supported here --> src/main.rs:5:3 | 5 | (let r = 5); | ^^^^^^^^^ | = note: only supported directly in conditions of `if` and `while` expressions note: `let`s wrapped in parentheses are not supported in a context with let chains --> src/main.rs:5:3 | 5 | (let r = 5); | ^^^^^^^^^ error[E0658]: `let` expressions in this position are unstable --> src/main.rs:5:3 | 5 | (let r = 5); | ^^^^^^^^^ | = note: see issue #53667 <https://github.com/rust-lang/rust/issues/53667> for more information = help: add `#![feature(let_chains)]` to the crate attributes to enable error: aborting due to 3 previous errors For more information about this error, try `rustc --explain E0658`. Original diagnostics will follow. warning: variable `r` is assigned to, but never used --> src/main.rs:4:6 | 4 | let r; | ^ | = note: consider using `_r` instead = note: `#[warn(unused_variables)]` on by default warning: value assigned to `r` is never read --> src/main.rs:5:3 | 5 | (r = 5); | ^ | = help: maybe it is overwritten before being read? = note: `#[warn(unused_assignments)]` on by default warning: unneeded late initialization --> src/main.rs:4:2 | 4 | let r; | ^^^^^^ created here 5 | (r = 5); | ^^^^^^^ initialised here | = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_late_init = note: requested on the command line with `-W clippy::needless-late-init` help: declare `r` here | 5 | (let r = 5); | ~~~~~ warning: `clpy` (bin "clpy") generated 3 warnings (run `cargo fix --bin "clpy"` to apply 1 suggestion) warning: `clpy` (bin "clpy" test) generated 3 warnings (3 duplicates) Finished dev [unoptimized + debuginfo] target(s) in 0.10s 

rustc 1.67.0-nightly (c5d82ed7a 2022-11-19) binary: rustc commit-hash: c5d82ed7a4ad94a538bb87e5016e7d5ce0bd434b commit-date: 2022-11-19 host: x86_64-unknown-linux-gnu release: 1.67.0-nightly LLVM version: 15.0.4