rust/tests/fail/shim_arg_size.rs

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// stderr-per-bitwidth
fn main() {
extern "C" {
// Use the wrong type(ie. not the pointer width) for the `size`
// argument.
#[cfg(target_pointer_width = "64")]
fn malloc(size: u32) -> *mut std::ffi::c_void;
#[cfg(target_pointer_width = "32")]
fn malloc(size: u16) -> *mut std::ffi::c_void;
}
unsafe {
let _p1 = malloc(42); //~ ERROR Undefined Behavior: scalar size mismatch
};
}