error[E0658]: `const extern fn` definitions are unstable
  --> $DIR/feature-gate-const_extern_fn.rs:3:1
   |
LL | const extern fn foo1() {}
   | ^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: see issue #64926 <https://github.com/rust-lang/rust/issues/64926> for more information
   = help: add `#![feature(const_extern_fn)]` to the crate attributes to enable

error[E0658]: `const extern fn` definitions are unstable
  --> $DIR/feature-gate-const_extern_fn.rs:4:1
   |
LL | const extern "C" fn foo2() {}
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: see issue #64926 <https://github.com/rust-lang/rust/issues/64926> for more information
   = help: add `#![feature(const_extern_fn)]` to the crate attributes to enable

error[E0658]: `const extern fn` definitions are unstable
  --> $DIR/feature-gate-const_extern_fn.rs:5:1
   |
LL | const extern "Rust" fn foo3() {}
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: see issue #64926 <https://github.com/rust-lang/rust/issues/64926> for more information
   = help: add `#![feature(const_extern_fn)]` to the crate attributes to enable

error[E0658]: `const extern fn` definitions are unstable
  --> $DIR/feature-gate-const_extern_fn.rs:6:1
   |
LL | const unsafe extern fn bar1() {}
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: see issue #64926 <https://github.com/rust-lang/rust/issues/64926> for more information
   = help: add `#![feature(const_extern_fn)]` to the crate attributes to enable

error[E0658]: `const extern fn` definitions are unstable
  --> $DIR/feature-gate-const_extern_fn.rs:7:1
   |
LL | const unsafe extern "C" fn bar2() {}
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: see issue #64926 <https://github.com/rust-lang/rust/issues/64926> for more information
   = help: add `#![feature(const_extern_fn)]` to the crate attributes to enable

error[E0658]: `const extern fn` definitions are unstable
  --> $DIR/feature-gate-const_extern_fn.rs:8:1
   |
LL | const unsafe extern "Rust" fn bar3() {}
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: see issue #64926 <https://github.com/rust-lang/rust/issues/64926> for more information
   = help: add `#![feature(const_extern_fn)]` to the crate attributes to enable

error: aborting due to 6 previous errors

For more information about this error, try `rustc --explain E0658`.