error[E0658]: the extern "rust-call" ABI is experimental and subject to change
  --> $DIR/feature-gate-abi.rs:11:8
   |
LL | extern "rust-call" fn f4(_: ()) {}
   |        ^^^^^^^^^^^
   |
   = 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   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date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 extern "rust-call" ABI is experimental and subject to change
  --> $DIR/feature-gate-abi.rs:15:12
   |
LL |     extern "rust-call" fn m4(_: ());
   |            ^^^^^^^^^^^
   |
   = 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   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date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 extern "rust-call" ABI is experimental and subject to change
  --> $DIR/feature-gate-abi.rs:17:12
   |
LL |     extern "rust-call" fn dm4(_: ()) {}
   |            ^^^^^^^^^^^
   |
   = 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   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date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 extern "rust-call" ABI is experimental and subject to change
  --> $DIR/feature-gate-abi.rs:24:12
   |
LL |     extern "rust-call" fn m4(_: ()) {}
   |            ^^^^^^^^^^^
   |
   = 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   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date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 extern "rust-call" ABI is experimental and subject to change
  --> $DIR/feature-gate-abi.rs:29:12
   |
LL |     extern "rust-call" fn im4(_: ()) {}
   |            ^^^^^^^^^^^
   |
   = 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   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date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 extern "rust-call" ABI is experimental and subject to change
  --> $DIR/feature-gate-abi.rs:33:18
   |
LL | type A4 = extern "rust-call" fn(_: ());
   |                  ^^^^^^^^^^^
   |
   = 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 extern "rust-call" ABI is experimental and subject to change
  --> $DIR/feature-gate-abi.rs:36:8
   |
LL | extern "rust-call" {}
   |        ^^^^^^^^^^^
   |
   = 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: aborting due to 7 previous errors

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