Nightly feature let_chains bug

[Cryptex-github]

I tried this code:

#![feature(let_chains)]

fn main() {
    let opt = Some("foo bar");

    if true && let Some(x) = opt {
        println!("{}", x);
    }
}

I expected to see this happen: print foo bar to console

Instead, this happened:

error[E0381]: borrow of possibly-uninitialized variable: `x`
 --> src/main.rs:7:24
  |
7 |         println!("{}", x);
  |                        ^ use of possibly-uninitialized `x`
  |
  = note: this error originates in the macro `$crate::format_args_nl` (in Nightly builds, run with -Z macro-backtrace for more info)

Meta

rustc --version --verbose:

rustc 1.59.0-nightly (e95e084a1 2021-12-19)
binary: rustc
commit-hash: e95e084a14870a718c712936ab5a8f8cd0159485
commit-date: 2021-12-19
host: x86_64-unknown-linux-gnu
release: 1.59.0-nightly
LLVM version: 13.0.0

Backtrace

No backtrace available

[Cryptex-github]

@rustbot label +F-let_chains +T-compiler +requires-nightly

[c410-f3r]

This issue can be closed

[Cryptex-github]

This issue can be closed

Thanks for finish implementing it.