error: expected expression, found `let` statement --> $DIR/feature-gate.rs:55:20 | LL | #[cfg(FALSE)] (let 0 = 1); | ^^^ error: expected expression, found `let` statement --> $DIR/feature-gate.rs:45:17 | LL | noop_expr!((let 0 = 1)); | ^^^ error: no rules expected the token `let` --> $DIR/feature-gate.rs:58:15 | LL | macro_rules! use_expr { | --------------------- when calling this macro ... LL | use_expr!(let 0 = 1); | ^^^ no rules expected this token in macro call | note: while trying to match meta-variable `$e:expr` --> $DIR/feature-gate.rs:50:10 | LL | ($e:expr) => { | ^^^^^^^ error[E0658]: `let` expressions in this position are unstable --> $DIR/feature-gate.rs:14:16 | LL | if true && let 0 = 1 {} | ^^^^^^^^^ | = note: see issue #53667 for more information = help: add `#![feature(let_chains)]` to the crate attributes to enable error[E0658]: `let` expressions in this position are unstable --> $DIR/feature-gate.rs:17:8 | LL | if let 0 = 1 && true {} | ^^^^^^^^^ | = note: see issue #53667 for more information = help: add `#![feature(let_chains)]` to the crate attributes to enable error[E0658]: `let` expressions in this position are unstable --> $DIR/feature-gate.rs:20:8 | LL | if let Range { start: _, end: _ } = (true..true) && false {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = note: see issue #53667 for more information = help: add `#![feature(let_chains)]` to the crate attributes to enable error[E0658]: `let` expressions in this position are unstable --> $DIR/feature-gate.rs:23:8 | LL | if let 1 = 1 && let true = { true } && false { | ^^^^^^^^^ | = note: see issue #53667 for more information = help: add `#![feature(let_chains)]` to the crate attributes to enable error[E0658]: `let` expressions in this position are unstable --> $DIR/feature-gate.rs:23:21 | LL | if let 1 = 1 && let true = { true } && false { | ^^^^^^^^^^^^^^^^^^^ | = note: see issue #53667 for more information = help: add `#![feature(let_chains)]` to the crate attributes to enable error[E0658]: `let` expressions in this position are unstable --> $DIR/feature-gate.rs:32:19 | LL | while true && let 0 = 1 {} | ^^^^^^^^^ | = note: see issue #53667 for more information = help: add `#![feature(let_chains)]` to the crate attributes to enable error[E0658]: `let` expressions in this position are unstable --> $DIR/feature-gate.rs:35:11 | LL | while let 0 = 1 && true {} | ^^^^^^^^^ | = note: see issue #53667 for more information = help: add `#![feature(let_chains)]` to the crate attributes to enable error[E0658]: `let` expressions in this position are unstable --> $DIR/feature-gate.rs:38:11 | LL | while let Range { start: _, end: _ } = (true..true) && false {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | = note: see issue #53667 for more information = help: add `#![feature(let_chains)]` to the crate attributes to enable error[E0658]: `let` expressions in this position are unstable --> $DIR/feature-gate.rs:55:20 | LL | #[cfg(FALSE)] (let 0 = 1); | ^^^^^^^^^ | = note: see issue #53667 for more information = help: add `#![feature(let_chains)]` to the crate attributes to enable error[E0658]: `let` expressions in this position are unstable --> $DIR/feature-gate.rs:45:17 | LL | noop_expr!((let 0 = 1)); | ^^^^^^^^^ | = note: see issue #53667 for more information = help: add `#![feature(let_chains)]` to the crate attributes to enable error: aborting due to 13 previous errors For more information about this error, try `rustc --explain E0658`.