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Diffstat (limited to 'src/test/ui/impl-trait/must_outlive_least_region_or_bound.stderr')
| -rw-r--r-- | src/test/ui/impl-trait/must_outlive_least_region_or_bound.stderr | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/src/test/ui/impl-trait/must_outlive_least_region_or_bound.stderr b/src/test/ui/impl-trait/must_outlive_least_region_or_bound.stderr new file mode 100644 index 000000000..16767abd7 --- /dev/null +++ b/src/test/ui/impl-trait/must_outlive_least_region_or_bound.stderr @@ -0,0 +1,126 @@ +error[E0700]: hidden type for `impl Copy` captures lifetime that does not appear in bounds + --> $DIR/must_outlive_least_region_or_bound.rs:3:35 + | +LL | fn elided(x: &i32) -> impl Copy { x } + | ---- ^ + | | + | hidden type `&i32` captures the anonymous lifetime defined here + | +help: to declare that the `impl Trait` captures `'_`, you can add an explicit `'_` lifetime bound + | +LL | fn elided(x: &i32) -> impl Copy + '_ { x } + | ++++ + +error[E0700]: hidden type for `impl Copy` captures lifetime that does not appear in bounds + --> $DIR/must_outlive_least_region_or_bound.rs:6:44 + | +LL | fn explicit<'a>(x: &'a i32) -> impl Copy { x } + | -- ^ + | | + | hidden type `&'a i32` captures the lifetime `'a` as defined here + | +help: to declare that the `impl Trait` captures `'a`, you can add an explicit `'a` lifetime bound + | +LL | fn explicit<'a>(x: &'a i32) -> impl Copy + 'a { x } + | ++++ + +error: lifetime may not live long enough + --> $DIR/must_outlive_least_region_or_bound.rs:9:46 + | +LL | fn elided2(x: &i32) -> impl Copy + 'static { x } + | - ^ returning this value requires that `'1` must outlive `'static` + | | + | let's call the lifetime of this reference `'1` + | +help: consider changing the `impl Trait`'s explicit `'static` bound to the lifetime of argument `x` + | +LL | fn elided2(x: &i32) -> impl Copy + '_ { x } + | ~~ +help: alternatively, add an explicit `'static` bound to this reference + | +LL | fn elided2(x: &'static i32) -> impl Copy + 'static { x } + | ~~~~~~~~~~~~ + +error: lifetime may not live long enough + --> $DIR/must_outlive_least_region_or_bound.rs:12:55 + | +LL | fn explicit2<'a>(x: &'a i32) -> impl Copy + 'static { x } + | -- lifetime `'a` defined here ^ returning this value requires that `'a` must outlive `'static` + | +help: consider changing the `impl Trait`'s explicit `'static` bound to the lifetime of argument `x` + | +LL | fn explicit2<'a>(x: &'a i32) -> impl Copy + 'a { x } + | ~~ +help: alternatively, add an explicit `'static` bound to this reference + | +LL | fn explicit2<'a>(x: &'static i32) -> impl Copy + 'static { x } + | ~~~~~~~~~~~~ + +error[E0621]: explicit lifetime required in the type of `x` + --> $DIR/must_outlive_least_region_or_bound.rs:15:41 + | +LL | fn foo<'a>(x: &i32) -> impl Copy + 'a { x } + | ---- ^ lifetime `'a` required + | | + | help: add explicit lifetime `'a` to the type of `x`: `&'a i32` + +error: lifetime may not live long enough + --> $DIR/must_outlive_least_region_or_bound.rs:26:55 + | +LL | fn elided5(x: &i32) -> (Box<dyn Debug>, impl Debug) { (Box::new(x), x) } + | - ^^^^^^^^^^^^^^^^ returning this value requires that `'1` must outlive `'static` + | | + | let's call the lifetime of this reference `'1` + | +help: to declare that the trait object captures data from argument `x`, you can add an explicit `'_` lifetime bound + | +LL | fn elided5(x: &i32) -> (Box<dyn Debug + '_>, impl Debug) { (Box::new(x), x) } + | ++++ +help: to declare that the `impl Trait` captures data from argument `x`, you can add an explicit `'_` lifetime bound + | +LL | fn elided5(x: &i32) -> (Box<dyn Debug>, impl Debug + '_) { (Box::new(x), x) } + | ++++ + +error: lifetime may not live long enough + --> $DIR/must_outlive_least_region_or_bound.rs:32:69 + | +LL | fn with_bound<'a>(x: &'a i32) -> impl LifetimeTrait<'a> + 'static { x } + | -- lifetime `'a` defined here ^ returning this value requires that `'a` must outlive `'static` + | +help: consider changing the `impl Trait`'s explicit `'static` bound to the lifetime of argument `x` + | +LL | fn with_bound<'a>(x: &'a i32) -> impl LifetimeTrait<'a> + 'a { x } + | ~~ +help: alternatively, add an explicit `'static` bound to this reference + | +LL | fn with_bound<'a>(x: &'static i32) -> impl LifetimeTrait<'a> + 'static { x } + | ~~~~~~~~~~~~ + +error[E0700]: hidden type for `impl Fn(&'a u32)` captures lifetime that does not appear in bounds + --> $DIR/must_outlive_least_region_or_bound.rs:38:5 + | +LL | fn move_lifetime_into_fn<'a, 'b>(x: &'a u32, y: &'b u32) -> impl Fn(&'a u32) { + | -- hidden type `[closure@$DIR/must_outlive_least_region_or_bound.rs:38:5: 38:13]` captures the lifetime `'b` as defined here +LL | move |_| println!("{}", y) + | ^^^^^^^^^^^^^^^^^^^^^^^^^^ + | +help: to declare that the `impl Trait` captures `'b`, you can add an explicit `'b` lifetime bound + | +LL | fn move_lifetime_into_fn<'a, 'b>(x: &'a u32, y: &'b u32) -> impl Fn(&'a u32) + 'b { + | ++++ + +error[E0310]: the parameter type `T` may not live long enough + --> $DIR/must_outlive_least_region_or_bound.rs:43:5 + | +LL | x + | ^ ...so that the type `T` will meet its required lifetime bounds + | +help: consider adding an explicit lifetime bound... + | +LL | fn ty_param_wont_outlive_static<T:Debug + 'static>(x: T) -> impl Debug + 'static { + | +++++++++ + +error: aborting due to 9 previous errors + +Some errors have detailed explanations: E0310, E0621, E0700. +For more information about an error, try `rustc --explain E0310`. |