rust/src/test/ui/parser/fn-header-semantic-fail.stderr

error: functions cannot be both `const` and `async`
  --> $DIR/fn-header-semantic-fail.rs:12:5
   |
LL |     const async unsafe extern "C" fn ff5() {}
   |     ^^^^^-^^^^^------------------------------
   |     |     |
   |     |     `async` because of this
   |     `const` because of this

error[E0379]: functions in traits cannot be declared const
  --> $DIR/fn-header-semantic-fail.rs:19:9
   |
LL |         const fn ft3();
   |         ^^^^^ functions in traits cannot be const

error[E0379]: functions in traits cannot be declared const
  --> $DIR/fn-header-semantic-fail.rs:21:9
   |
LL |         const async unsafe extern "C" fn ft5();
   |         ^^^^^ functions in traits cannot be const

error: functions cannot be both `const` and `async`
  --> $DIR/fn-header-semantic-fail.rs:21:9
   |
LL |         const async unsafe extern "C" fn ft5();
   |         ^^^^^-^^^^^----------------------------
   |         |     |
   |         |     `async` because of this
   |         `const` because of this

error[E0379]: functions in traits cannot be declared const
  --> $DIR/fn-header-semantic-fail.rs:31:9
   |
LL |         const fn ft3() {}
   |         ^^^^^ functions in traits cannot be const

error[E0379]: functions in traits cannot be declared const
  --> $DIR/fn-header-semantic-fail.rs:33:9
   |
LL |         const async unsafe extern "C" fn ft5() {}
   |         ^^^^^ functions in traits cannot be const

error: functions cannot be both `const` and `async`
  --> $DIR/fn-header-semantic-fail.rs:33:9
   |
LL |         const async unsafe extern "C" fn ft5() {}
   |         ^^^^^-^^^^^------------------------------
   |         |     |
   |         |     `async` because of this
   |         `const` because of this

error: functions cannot be both `const` and `async`
  --> $DIR/fn-header-semantic-fail.rs:45:9
   |
LL |         const async unsafe extern "C" fn fi5() {}
   |         ^^^^^-^^^^^------------------------------
   |         |     |
   |         |     `async` because of this
   |         `const` because of this

error: functions in `extern` blocks cannot have qualifiers
  --> $DIR/fn-header-semantic-fail.rs:51:18
   |
LL |     extern "C" {
   |     ---------- in this `extern` block
LL |         async fn fe1();
   |                  ^^^
   |
help: remove the qualifiers
   |
LL |         fn fe1();
   |         ~~

error: functions in `extern` blocks cannot have qualifiers
  --> $DIR/fn-header-semantic-fail.rs:52:19
   |
LL |     extern "C" {
   |     ---------- in this `extern` block
LL |         async fn fe1();
LL |         unsafe fn fe2();
   |                   ^^^
   |
help: remove the qualifiers
   |
LL |         fn fe2();
   |         ~~

error: functions in `extern` blocks cannot have qualifiers
  --> $DIR/fn-header-semantic-fail.rs:53:18
   |
LL |     extern "C" {
   |     ---------- in this `extern` block
...
LL |         const fn fe3();
   |                  ^^^
   |
help: remove the qualifiers
   |
LL |         fn fe3();
   |         ~~

error: functions in `extern` blocks cannot have qualifiers
  --> $DIR/fn-header-semantic-fail.rs:54:23
   |
LL |     extern "C" {
   |     ---------- in this `extern` block
...
LL |         extern "C" fn fe4();
   |                       ^^^
   |
help: remove the qualifiers
   |
LL |         fn fe4();
   |         ~~

error: functions in `extern` blocks cannot have qualifiers
  --> $DIR/fn-header-semantic-fail.rs:55:42
   |
LL |     extern "C" {
   |     ---------- in this `extern` block
...
LL |         const async unsafe extern "C" fn fe5();
   |                                          ^^^
   |
help: remove the qualifiers
   |
LL |         fn fe5();
   |         ~~

error: functions cannot be both `const` and `async`
  --> $DIR/fn-header-semantic-fail.rs:55:9
   |
LL |         const async unsafe extern "C" fn fe5();
   |         ^^^^^-^^^^^----------------------------
   |         |     |
   |         |     `async` because of this
   |         `const` because of this

error[E0706]: functions in traits cannot be declared `async`
  --> $DIR/fn-header-semantic-fail.rs:17:9
   |
LL |         async fn ft1();
   |         -----^^^^^^^^^^
   |         |
   |         `async` because of this
   |
   = note: `async` trait functions are not currently supported
   = note: consider using the `async-trait` crate: https://crates.io/crates/async-trait
   = note: see issue #91611 <https://github.com/rust-lang/rust/issues/91611> for more information
   = help: add `#![feature(async_fn_in_trait)]` to the crate attributes to enable

error[E0706]: functions in traits cannot be declared `async`
  --> $DIR/fn-header-semantic-fail.rs:21:9
   |
LL |         const async unsafe extern "C" fn ft5();
   |         ^^^^^^-----^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |               |
   |               `async` because of this
   |
   = note: `async` trait functions are not currently supported
   = note: consider using the `async-trait` crate: https://crates.io/crates/async-trait
   = note: see issue #91611 <https://github.com/rust-lang/rust/issues/91611> for more information
   = help: add `#![feature(async_fn_in_trait)]` to the crate attributes to enable

error[E0706]: functions in traits cannot be declared `async`
  --> $DIR/fn-header-semantic-fail.rs:29:9
   |
LL |         async fn ft1() {}
   |         -----^^^^^^^^^
   |         |
   |         `async` because of this
   |
   = note: `async` trait functions are not currently supported
   = note: consider using the `async-trait` crate: https://crates.io/crates/async-trait
   = note: see issue #91611 <https://github.com/rust-lang/rust/issues/91611> for more information
   = help: add `#![feature(async_fn_in_trait)]` to the crate attributes to enable

error[E0706]: functions in traits cannot be declared `async`
  --> $DIR/fn-header-semantic-fail.rs:33:9
   |
LL |         const async unsafe extern "C" fn ft5() {}
   |         ^^^^^^-----^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |               |
   |               `async` because of this
   |
   = note: `async` trait functions are not currently supported
   = note: consider using the `async-trait` crate: https://crates.io/crates/async-trait
   = note: see issue #91611 <https://github.com/rust-lang/rust/issues/91611> for more information
   = help: add `#![feature(async_fn_in_trait)]` to the crate attributes to enable

error[E0391]: cycle detected when computing type of `main::ff5::{opaque#0}`
  --> $DIR/fn-header-semantic-fail.rs:12:44
   |
LL |     const async unsafe extern "C" fn ff5() {}
   |                                            ^
   |
note: ...which requires borrow-checking `main::ff5`...
  --> $DIR/fn-header-semantic-fail.rs:12:5
   |
LL |     const async unsafe extern "C" fn ff5() {}
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: ...which requires processing `main::ff5`...
  --> $DIR/fn-header-semantic-fail.rs:12:5
   |
LL |     const async unsafe extern "C" fn ff5() {}
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: ...which requires const checking `main::ff5`...
  --> $DIR/fn-header-semantic-fail.rs:12:5
   |
LL |     const async unsafe extern "C" fn ff5() {}
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   = note: ...which requires computing whether `impl core::future::future::Future<Output = ()>` is freeze...
   = note: ...which requires evaluating trait selection obligation `impl core::future::future::Future<Output = ()>: core::marker::Freeze`...
   = note: ...which again requires computing type of `main::ff5::{opaque#0}`, completing the cycle
note: cycle used when checking item types in top-level module
  --> $DIR/fn-header-semantic-fail.rs:5:1
   |
LL | / #![feature(const_extern_fn)]
LL | |
LL | | fn main() {
LL | |     async fn ff1() {} // OK.
...  |
LL | |     }
LL | | }
   | |_^

error[E0391]: cycle detected when computing type of `main::<impl at $DIR/fn-header-semantic-fail.rs:28:5: 28:17>::ft5::{opaque#0}`
  --> $DIR/fn-header-semantic-fail.rs:33:48
   |
LL |         const async unsafe extern "C" fn ft5() {}
   |                                                ^
   |
note: ...which requires borrow-checking `main::<impl at $DIR/fn-header-semantic-fail.rs:28:5: 28:17>::ft5`...
  --> $DIR/fn-header-semantic-fail.rs:33:9
   |
LL |         const async unsafe extern "C" fn ft5() {}
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: ...which requires processing `main::<impl at $DIR/fn-header-semantic-fail.rs:28:5: 28:17>::ft5`...
  --> $DIR/fn-header-semantic-fail.rs:33:9
   |
LL |         const async unsafe extern "C" fn ft5() {}
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: ...which requires const checking `main::<impl at $DIR/fn-header-semantic-fail.rs:28:5: 28:17>::ft5`...
  --> $DIR/fn-header-semantic-fail.rs:33:9
   |
LL |         const async unsafe extern "C" fn ft5() {}
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   = note: ...which requires computing whether `impl core::future::future::Future<Output = ()>` is freeze...
   = note: ...which requires evaluating trait selection obligation `impl core::future::future::Future<Output = ()>: core::marker::Freeze`...
   = note: ...which again requires computing type of `main::<impl at $DIR/fn-header-semantic-fail.rs:28:5: 28:17>::ft5::{opaque#0}`, completing the cycle
note: cycle used when checking item types in top-level module
  --> $DIR/fn-header-semantic-fail.rs:5:1
   |
LL | / #![feature(const_extern_fn)]
LL | |
LL | | fn main() {
LL | |     async fn ff1() {} // OK.
...  |
LL | |     }
LL | | }
   | |_^

error[E0391]: cycle detected when computing type of `main::<impl at $DIR/fn-header-semantic-fail.rs:40:5: 40:11>::fi5::{opaque#0}`
  --> $DIR/fn-header-semantic-fail.rs:45:48
   |
LL |         const async unsafe extern "C" fn fi5() {}
   |                                                ^
   |
note: ...which requires borrow-checking `main::<impl at $DIR/fn-header-semantic-fail.rs:40:5: 40:11>::fi5`...
  --> $DIR/fn-header-semantic-fail.rs:45:9
   |
LL |         const async unsafe extern "C" fn fi5() {}
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: ...which requires processing `main::<impl at $DIR/fn-header-semantic-fail.rs:40:5: 40:11>::fi5`...
  --> $DIR/fn-header-semantic-fail.rs:45:9
   |
LL |         const async unsafe extern "C" fn fi5() {}
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: ...which requires const checking `main::<impl at $DIR/fn-header-semantic-fail.rs:40:5: 40:11>::fi5`...
  --> $DIR/fn-header-semantic-fail.rs:45:9
   |
LL |         const async unsafe extern "C" fn fi5() {}
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   = note: ...which requires computing whether `impl core::future::future::Future<Output = ()>` is freeze...
   = note: ...which requires evaluating trait selection obligation `impl core::future::future::Future<Output = ()>: core::marker::Freeze`...
   = note: ...which again requires computing type of `main::<impl at $DIR/fn-header-semantic-fail.rs:40:5: 40:11>::fi5::{opaque#0}`, completing the cycle
note: cycle used when checking item types in top-level module
  --> $DIR/fn-header-semantic-fail.rs:5:1
   |
LL | / #![feature(const_extern_fn)]
LL | |
LL | | fn main() {
LL | |     async fn ff1() {} // OK.
...  |
LL | |     }
LL | | }
   | |_^

error: aborting due to 21 previous errors

Some errors have detailed explanations: E0379, E0391, E0706.
For more information about an error, try `rustc --explain E0379`.