error[E0703]: invalid ABI: found `rust-cull`
  --> $DIR/abi-typo-unstable.rs:5:8
   |
LL | extern "rust-cull" fn rust_call(_: ()) {}
   |        ^^^^^^^^^^^ invalid ABI
   |
   = note: invoke `rustc --print=calling-conventions` for a full list of supported calling conventions
help: there's a similarly named valid ABI `rust-call`
   |
LL - extern "rust-cull" fn rust_call(_: ()) {}
LL + extern "rust-call" fn rust_call(_: ()) {}
   |

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0703`.