warning: irrefutable `if let` pattern --> $DIR/issue-78720.rs:7:8 | LL | if let a = "" { | ^^^^^^^^^^ | = note: this pattern will always match, so the `if let` is useless = help: consider replacing the `if let` with a `let` = note: `#[warn(irrefutable_let_patterns)]` on by default warning: 1 warning emitted