tests/ui/extern/windows-tcb-trash-13259.rs

//! Regression test for https://github.com/rust-lang/rust/issues/13259

//@ run-pass

#[cfg(windows)]
mod imp {
    type LPVOID = *mut u8;
    type DWORD = u32;
    type LPWSTR = *mut u16;

    extern "system" {
        fn FormatMessageW(
            flags: DWORD,
            lpSrc: LPVOID,
            msgId: DWORD,
            langId: DWORD,
            buf: LPWSTR,
            nsize: DWORD,
            args: *const u8,
        ) -> DWORD;
    }

    pub fn test() {
        let mut buf: [u16; 50] = [0; 50];
        let ret = unsafe {
            FormatMessageW(
                0x1000,
                core::ptr::null_mut(),
                1,
                0x400,
                buf.as_mut_ptr(),
                buf.len() as u32,
                core::ptr::null(),
            )
        };
        // On some 32-bit Windowses (Win7-8 at least) this will panic with segmented
        // stacks taking control of pvArbitrary
        assert!(ret != 0);
    }
}

#[cfg(not(windows))]
mod imp {
    pub fn test() {}
}

fn main() {
    imp::test()
}