rust/tests/ui/issues/issue-16256.stderr

warning: unused closure that must be used
  --> $DIR/issue-16256.rs:6:5
   |
LL |     |c: u8| buf.push(c);
   |     ^^^^^^^^^^^^^^^^^^^
   |
   = note: closures are lazy and do nothing unless called
   = note: `#[warn(unused_must_use)]` on by default

warning: 1 warning emitted
Make closures and generators a must use types Warn about unused expressions with closure or generator type. This follows existing precedence of must use annotations present on `FnOnce`, `FnMut`, `Fn` traits, which already indirectly apply to closures in some cases, e.g.,: ```rust fn f() -> impl FnOnce() { \|\| {} } fn main() { // an existing warning: unused implementer of `std::ops::FnOnce` that must be used: f(); // a new warning: unused closure that must be used: \|\| {}; } ``` 2020-07-28 00:00:00 +00:00			`warning: unused closure that must be used`
			`--> $DIR/issue-16256.rs:6:5`
			`\|`
			`LL \| \|c: u8\| buf.push(c);`
Tweak span for `#[must_use]` Do not point at whole statement, only at the expression (skip pointing at `;`) 2022-08-16 14:46:33 +00:00			`\| ^^^^^^^^^^^^^^^^^^^`
Make closures and generators a must use types Warn about unused expressions with closure or generator type. This follows existing precedence of must use annotations present on `FnOnce`, `FnMut`, `Fn` traits, which already indirectly apply to closures in some cases, e.g.,: ```rust fn f() -> impl FnOnce() { \|\| {} } fn main() { // an existing warning: unused implementer of `std::ops::FnOnce` that must be used: f(); // a new warning: unused closure that must be used: \|\| {}; } ``` 2020-07-28 00:00:00 +00:00			`\|`
			`= note: closures are lazy and do nothing unless called`
bless ui tests 2022-09-18 15:55:36 +00:00			= note: `#[warn(unused_must_use)]` on by default
Make closures and generators a must use types Warn about unused expressions with closure or generator type. This follows existing precedence of must use annotations present on `FnOnce`, `FnMut`, `Fn` traits, which already indirectly apply to closures in some cases, e.g.,: ```rust fn f() -> impl FnOnce() { \|\| {} } fn main() { // an existing warning: unused implementer of `std::ops::FnOnce` that must be used: f(); // a new warning: unused closure that must be used: \|\| {}; } ``` 2020-07-28 00:00:00 +00:00
			`warning: 1 warning emitted`