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error[E0106]: missing lifetime specifier
--> $DIR/impl-fn-hrtb-bounds.rs:19:38
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LL | fn d() -> impl Fn() -> (impl Debug + '_) {
| ^^ expected named lifetime parameter
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= help: this function's return type contains a borrowed value, but there is no value for it to be borrowed from
help: consider using the `'static` lifetime, but this is uncommon unless you're returning a borrowed value from a `const` or a `static`, or if you will only have owned values
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LL - fn d() -> impl Fn() -> (impl Debug + '_) {
LL + fn d() -> impl Fn() -> (impl Debug + 'static) {
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error[E0657]: `impl Trait` cannot capture higher-ranked lifetime from outer `impl Trait`
--> $DIR/impl-fn-hrtb-bounds.rs:4:41
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LL | fn a() -> impl Fn(&u8) -> (impl Debug + '_) {
| ^^
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note: lifetime declared here
--> $DIR/impl-fn-hrtb-bounds.rs:4:19
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LL | fn a() -> impl Fn(&u8) -> (impl Debug + '_) {
| ^
error[E0657]: `impl Trait` cannot capture higher-ranked lifetime from outer `impl Trait`
--> $DIR/impl-fn-hrtb-bounds.rs:9:52
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LL | fn b() -> impl for<'a> Fn(&'a u8) -> (impl Debug + 'a) {
| ^^
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note: lifetime declared here
--> $DIR/impl-fn-hrtb-bounds.rs:9:20
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LL | fn b() -> impl for<'a> Fn(&'a u8) -> (impl Debug + 'a) {
| ^^
error[E0657]: `impl Trait` cannot capture higher-ranked lifetime from outer `impl Trait`
--> $DIR/impl-fn-hrtb-bounds.rs:14:52
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LL | fn c() -> impl for<'a> Fn(&'a u8) -> (impl Debug + '_) {
| ^^
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note: lifetime declared here
--> $DIR/impl-fn-hrtb-bounds.rs:14:20
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LL | fn c() -> impl for<'a> Fn(&'a u8) -> (impl Debug + '_) {
| ^^
error: aborting due to 4 previous errors
Some errors have detailed explanations: E0106, E0657.
For more information about an error, try `rustc --explain E0106`.
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