error[E0666]: nested `impl Trait` is not allowed --> $DIR/where-allowed.rs:47:51 | LL | fn in_impl_Fn_parameter_in_parameters(_: &impl Fn(impl Debug)) { panic!() } | --------^^^^^^^^^^- | | | | | nested `impl Trait` here | outer `impl Trait` error[E0666]: nested `impl Trait` is not allowed --> $DIR/where-allowed.rs:56:57 | LL | fn in_impl_Fn_parameter_in_return() -> &'static impl Fn(impl Debug) { panic!() } | --------^^^^^^^^^^- | | | | | nested `impl Trait` here | outer `impl Trait` error[E0658]: `impl Trait` in type aliases is unstable --> $DIR/where-allowed.rs:119:16 | LL | type Out = impl Debug; | ^^^^^^^^^^ | = note: see issue #63063 for more information = help: add `#![feature(type_alias_impl_trait)]` to the crate attributes to enable error[E0658]: `impl Trait` in type aliases is unstable --> $DIR/where-allowed.rs:155:23 | LL | type InTypeAlias = impl Debug; | ^^^^^^^^^^ | = note: see issue #63063 for more information = help: add `#![feature(type_alias_impl_trait)]` to the crate attributes to enable error[E0658]: `impl Trait` in type aliases is unstable --> $DIR/where-allowed.rs:159:39 | LL | type InReturnInTypeAlias = fn() -> impl Debug; | ^^^^^^^^^^ | = note: see issue #63063 for more information = help: add `#![feature(type_alias_impl_trait)]` to the crate attributes to enable error[E0562]: `impl Trait` not allowed outside of function and inherent method return types --> $DIR/where-allowed.rs:15:40 | LL | fn in_fn_parameter_in_parameters(_: fn(impl Debug)) { panic!() } | ^^^^^^^^^^ error[E0562]: `impl Trait` not allowed outside of function and inherent method return types --> $DIR/where-allowed.rs:19:42 | LL | fn in_fn_return_in_parameters(_: fn() -> impl Debug) { panic!() } | ^^^^^^^^^^ error[E0562]: `impl Trait` not allowed outside of function and inherent method return types --> $DIR/where-allowed.rs:23:38 | LL | fn in_fn_parameter_in_return() -> fn(impl Debug) { panic!() } | ^^^^^^^^^^ error[E0562]: `impl Trait` not allowed outside of function and inherent method return types --> $DIR/where-allowed.rs:27:40 | LL | fn in_fn_return_in_return() -> fn() -> impl Debug { panic!() } | ^^^^^^^^^^ error[E0562]: `impl Trait` not allowed outside of function and inherent method return types --> $DIR/where-allowed.rs:31:49 | LL | fn in_dyn_Fn_parameter_in_parameters(_: &dyn Fn(impl Debug)) { panic!() } | ^^^^^^^^^^ error[E0562]: `impl Trait` not allowed outside of function and inherent method return types --> $DIR/where-allowed.rs:35:51 | LL | fn in_dyn_Fn_return_in_parameters(_: &dyn Fn() -> impl Debug) { panic!() } | ^^^^^^^^^^ error[E0562]: `impl Trait` not allowed outside of function and inherent method return types --> $DIR/where-allowed.rs:39:55 | LL | fn in_dyn_Fn_parameter_in_return() -> &'static dyn Fn(impl Debug) { panic!() } | ^^^^^^^^^^ error[E0562]: `impl Trait` not allowed outside of function and inherent method return types --> $DIR/where-allowed.rs:43:57 | LL | fn in_dyn_Fn_return_in_return() -> &'static dyn Fn() -> impl Debug { panic!() } | ^^^^^^^^^^ error[E0562]: `impl Trait` not allowed outside of function and inherent method return types --> $DIR/where-allowed.rs:47:51 | LL | fn in_impl_Fn_parameter_in_parameters(_: &impl Fn(impl Debug)) { panic!() } | ^^^^^^^^^^ error[E0562]: `impl Trait` not allowed outside of function and inherent method return types --> $DIR/where-allowed.rs:52:53 | LL | fn in_impl_Fn_return_in_parameters(_: &impl Fn() -> impl Debug) { panic!() } | ^^^^^^^^^^ error[E0562]: `impl Trait` not allowed outside of function and inherent method return types --> $DIR/where-allowed.rs:56:57 | LL | fn in_impl_Fn_parameter_in_return() -> &'static impl Fn(impl Debug) { panic!() } | ^^^^^^^^^^ error[E0562]: `impl Trait` not allowed outside of function and inherent method return types --> $DIR/where-allowed.rs:61:59 | LL | fn in_impl_Fn_return_in_return() -> &'static impl Fn() -> impl Debug { panic!() } | ^^^^^^^^^^ error[E0562]: `impl Trait` not allowed outside of function and inherent method return types --> $DIR/where-allowed.rs:65:38 | LL | fn in_Fn_parameter_in_generics (_: F) { panic!() } | ^^^^^^^^^^ error[E0562]: `impl Trait` not allowed outside of function and inherent method return types --> $DIR/where-allowed.rs:69:40 | LL | fn in_Fn_return_in_generics impl Debug> (_: F) { panic!() } | ^^^^^^^^^^ error[E0562]: `impl Trait` not allowed outside of function and inherent method return types --> $DIR/where-allowed.rs:82:32 | LL | struct InBraceStructField { x: impl Debug } | ^^^^^^^^^^ error[E0562]: `impl Trait` not allowed outside of function and inherent method return types --> $DIR/where-allowed.rs:86:41 | LL | struct InAdtInBraceStructField { x: Vec } | ^^^^^^^^^^ error[E0562]: `impl Trait` not allowed outside of function and inherent method return types --> $DIR/where-allowed.rs:90:27 | LL | struct InTupleStructField(impl Debug); | ^^^^^^^^^^ error[E0562]: `impl Trait` not allowed outside of function and inherent method return types --> $DIR/where-allowed.rs:95:25 | LL | InBraceVariant { x: impl Debug }, | ^^^^^^^^^^ error[E0562]: `impl Trait` not allowed outside of function and inherent method return types --> $DIR/where-allowed.rs:97:20 | LL | InTupleVariant(impl Debug), | ^^^^^^^^^^ error[E0562]: `impl Trait` not allowed outside of function and inherent method return types --> $DIR/where-allowed.rs:108:23 | LL | fn in_return() -> impl Debug; | ^^^^^^^^^^ error[E0562]: `impl Trait` not allowed outside of function and inherent method return types --> $DIR/where-allowed.rs:126:34 | LL | fn in_trait_impl_return() -> impl Debug { () } | ^^^^^^^^^^ error[E0562]: `impl Trait` not allowed outside of function and inherent method return types --> $DIR/where-allowed.rs:139:33 | LL | fn in_foreign_parameters(_: impl Debug); | ^^^^^^^^^^ error[E0562]: `impl Trait` not allowed outside of function and inherent method return types --> $DIR/where-allowed.rs:142:31 | LL | fn in_foreign_return() -> impl Debug; | ^^^^^^^^^^ error[E0562]: `impl Trait` not allowed outside of function and inherent method return types --> $DIR/where-allowed.rs:159:39 | LL | type InReturnInTypeAlias = fn() -> impl Debug; | ^^^^^^^^^^ error[E0562]: `impl Trait` not allowed outside of function and inherent method return types --> $DIR/where-allowed.rs:164:16 | LL | impl PartialEq for () { | ^^^^^^^^^^ error[E0562]: `impl Trait` not allowed outside of function and inherent method return types --> $DIR/where-allowed.rs:169:24 | LL | impl PartialEq<()> for impl Debug { | ^^^^^^^^^^ error[E0562]: `impl Trait` not allowed outside of function and inherent method return types --> $DIR/where-allowed.rs:174:6 | LL | impl impl Debug { | ^^^^^^^^^^ error[E0562]: `impl Trait` not allowed outside of function and inherent method return types --> $DIR/where-allowed.rs:180:24 | LL | impl InInherentImplAdt { | ^^^^^^^^^^ error[E0562]: `impl Trait` not allowed outside of function and inherent method return types --> $DIR/where-allowed.rs:186:11 | LL | where impl Debug: Debug | ^^^^^^^^^^ error[E0562]: `impl Trait` not allowed outside of function and inherent method return types --> $DIR/where-allowed.rs:193:15 | LL | where Vec: Debug | ^^^^^^^^^^ error[E0562]: `impl Trait` not allowed outside of function and inherent method return types --> $DIR/where-allowed.rs:200:24 | LL | where T: PartialEq | ^^^^^^^^^^ error[E0562]: `impl Trait` not allowed outside of function and inherent method return types --> $DIR/where-allowed.rs:207:17 | LL | where T: Fn(impl Debug) | ^^^^^^^^^^ error[E0562]: `impl Trait` not allowed outside of function and inherent method return types --> $DIR/where-allowed.rs:214:22 | LL | where T: Fn() -> impl Debug | ^^^^^^^^^^ error[E0562]: `impl Trait` not allowed outside of function and inherent method return types --> $DIR/where-allowed.rs:220:29 | LL | let _in_local_variable: impl Fn() = || {}; | ^^^^^^^^^ | = help: add `#![feature(impl_trait_in_bindings)]` to the crate attributes to enable error[E0562]: `impl Trait` not allowed outside of function and inherent method return types --> $DIR/where-allowed.rs:222:46 | LL | let _in_return_in_local_variable = || -> impl Fn() { || {} }; | ^^^^^^^^^ error: could not find defining uses --> $DIR/where-allowed.rs:155:1 | LL | type InTypeAlias = impl Debug; | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ error: could not find defining uses --> $DIR/where-allowed.rs:119:5 | LL | type Out = impl Debug; | ^^^^^^^^^^^^^^^^^^^^^^ error: aborting due to 42 previous errors Some errors have detailed explanations: E0562, E0658, E0666. For more information about an error, try `rustc --explain E0562`.