error[E0658]: rust-call ABI is subject to change
  --> $DIR/feature-gate-unboxed-closures-manual-impls.rs:13:12
   |
LL |     extern "rust-call" fn call(self, args: ()) -> () {}
   |            ^^^^^^^^^^^
   |
   = note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
   = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date

error[E0658]: rust-call ABI is subject to change
  --> $DIR/feature-gate-unboxed-closures-manual-impls.rs:22:12
   |
LL |     extern "rust-call" fn call_once(self, args: ()) -> () {}
   |            ^^^^^^^^^^^
   |
   = note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
   = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date

error[E0658]: rust-call ABI is subject to change
  --> $DIR/feature-gate-unboxed-closures-manual-impls.rs:30:12
   |
LL |     extern "rust-call" fn call_mut(&self, args: ()) -> () {}
   |            ^^^^^^^^^^^
   |
   = note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
   = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date

error[E0658]: rust-call ABI is subject to change
  --> $DIR/feature-gate-unboxed-closures-manual-impls.rs:39:12
   |
LL |     extern "rust-call" fn call_once(&self, args: ()) -> () {}
   |            ^^^^^^^^^^^
   |
   = note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
   = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date

error[E0658]: the precise format of `Fn`-family traits' type parameters is subject to change
  --> $DIR/feature-gate-unboxed-closures-manual-impls.rs:9:6
   |
LL | impl Fn<()> for Foo {
   |      ^^^^^^
   |
   = note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
   = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date

error[E0183]: manual implementations of `Fn` are experimental
  --> $DIR/feature-gate-unboxed-closures-manual-impls.rs:9:6
   |
LL | impl Fn<()> for Foo {
   |      ^^^^^^ manual implementations of `Fn` are experimental
   |
   = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable

error[E0658]: the precise format of `Fn`-family traits' type parameters is subject to change
  --> $DIR/feature-gate-unboxed-closures-manual-impls.rs:26:6
   |
LL | impl FnMut<()> for Bar {
   |      ^^^^^^^^^
   |
   = note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
   = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date

error[E0183]: manual implementations of `FnMut` are experimental
  --> $DIR/feature-gate-unboxed-closures-manual-impls.rs:26:6
   |
LL | impl FnMut<()> for Bar {
   |      ^^^^^^^^^ manual implementations of `FnMut` are experimental
   |
   = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable

error[E0277]: expected a `FnMut()` closure, found `Foo`
  --> $DIR/feature-gate-unboxed-closures-manual-impls.rs:9:17
   |
LL | impl Fn<()> for Foo {
   |                 ^^^ expected an `FnMut()` closure, found `Foo`
   |
   = help: the trait `FnMut()` is not implemented for `Foo`
   = note: wrap the `Foo` in a closure with no arguments: `|| { /* code */ }`
note: required by a bound in `Fn`
  --> $SRC_DIR/core/src/ops/function.rs:LL:COL

error[E0053]: method `call` has an incompatible type for trait
  --> $DIR/feature-gate-unboxed-closures-manual-impls.rs:13:32
   |
LL |     extern "rust-call" fn call(self, args: ()) -> () {}
   |                                ^^^^ expected `&Foo`, found `Foo`
   |
   = note: expected signature `extern "rust-call" fn(&Foo, ()) -> _`
              found signature `extern "rust-call" fn(Foo, ()) -> ()`
help: change the self-receiver type to match the trait
   |
LL |     extern "rust-call" fn call(&self, args: ()) -> () {}
   |                                ~~~~~

error[E0183]: manual implementations of `FnOnce` are experimental
  --> $DIR/feature-gate-unboxed-closures-manual-impls.rs:18:6
   |
LL | impl FnOnce() for Foo1 {
   |      ^^^^^^^^ manual implementations of `FnOnce` are experimental
   |
   = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable

error[E0229]: associated item constraints are not allowed here
  --> $DIR/feature-gate-unboxed-closures-manual-impls.rs:18:6
   |
LL | impl FnOnce() for Foo1 {
   |      ^^^^^^^^ associated item constraint not allowed here
   |
help: parenthesized trait syntax expands to `FnOnce<(), Output=()>`
  --> $DIR/feature-gate-unboxed-closures-manual-impls.rs:18:6
   |
LL | impl FnOnce() for Foo1 {
   |      ^^^^^^^^

error[E0658]: the precise format of `Fn`-family traits' type parameters is subject to change
  --> $DIR/feature-gate-unboxed-closures-manual-impls.rs:35:6
   |
LL | impl FnOnce<()> for Baz {
   |      ^^^^^^^^^^
   |
   = note: see issue #29625 <https://github.com/rust-lang/rust/issues/29625> for more information
   = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable
   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date

error[E0183]: manual implementations of `FnOnce` are experimental
  --> $DIR/feature-gate-unboxed-closures-manual-impls.rs:35:6
   |
LL | impl FnOnce<()> for Baz {
   |      ^^^^^^^^^^ manual implementations of `FnOnce` are experimental
   |
   = help: add `#![feature(unboxed_closures)]` to the crate attributes to enable

error[E0046]: not all trait items implemented, missing: `Output`
  --> $DIR/feature-gate-unboxed-closures-manual-impls.rs:18:1
   |
LL | impl FnOnce() for Foo1 {
   | ^^^^^^^^^^^^^^^^^^^^^^ missing `Output` in implementation
   |
   = help: implement the missing item: `type Output = /* Type */;`

error[E0277]: expected a `FnOnce()` closure, found `Bar`
  --> $DIR/feature-gate-unboxed-closures-manual-impls.rs:26:20
   |
LL | impl FnMut<()> for Bar {
   |                    ^^^ expected an `FnOnce()` closure, found `Bar`
   |
   = help: the trait `FnOnce()` is not implemented for `Bar`
   = note: wrap the `Bar` in a closure with no arguments: `|| { /* code */ }`
note: required by a bound in `FnMut`
  --> $SRC_DIR/core/src/ops/function.rs:LL:COL

error[E0053]: method `call_mut` has an incompatible type for trait
  --> $DIR/feature-gate-unboxed-closures-manual-impls.rs:30:36
   |
LL |     extern "rust-call" fn call_mut(&self, args: ()) -> () {}
   |                                    ^^^^^ types differ in mutability
   |
   = note: expected signature `extern "rust-call" fn(&mut Bar, ()) -> _`
              found signature `extern "rust-call" fn(&Bar, ()) -> ()`
help: change the self-receiver type to match the trait
   |
LL |     extern "rust-call" fn call_mut(&mut self, args: ()) -> () {}
   |                                    ~~~~~~~~~

error[E0046]: not all trait items implemented, missing: `Output`
  --> $DIR/feature-gate-unboxed-closures-manual-impls.rs:35:1
   |
LL | impl FnOnce<()> for Baz {
   | ^^^^^^^^^^^^^^^^^^^^^^^ missing `Output` in implementation
   |
   = help: implement the missing item: `type Output = /* Type */;`

error: aborting due to 18 previous errors

Some errors have detailed explanations: E0046, E0053, E0183, E0229, E0277, E0658.
For more information about an error, try `rustc --explain E0046`.