error: Undefined Behavior: calling a function with ABI C using caller ABI Rust
  --> $DIR/check_callback_abi.rs:LL:CC
   |
LL | /         std::intrinsics::r#try(
LL | |
LL | |             std::mem::transmute::<extern "C" fn(*mut u8), _>(try_fn),
LL | |             std::ptr::null_mut(),
LL | |             |_, _| unreachable!(),
LL | |         );
   | |_________^ calling a function with ABI C using caller ABI Rust
   |
   = help: this indicates a bug in the program: it performed an invalid operation, and caused Undefined Behavior
   = help: see https://doc.rust-lang.org/nightly/reference/behavior-considered-undefined.html for further information
   = note: BACKTRACE:
   = note: inside `main` at $DIR/check_callback_abi.rs:LL:CC

note: some details are omitted, run with `MIRIFLAGS=-Zmiri-backtrace=full` for a verbose backtrace

error: aborting due to previous error