diff --git a/library/std/src/sys/windows/stdio_uwp.rs b/library/std/src/sys/windows/stdio_uwp.rs index 31ffa8c9571..32550f796ec 100644 --- a/library/std/src/sys/windows/stdio_uwp.rs +++ b/library/std/src/sys/windows/stdio_uwp.rs @@ -26,6 +26,7 @@ pub fn get_handle(handle_id: c::DWORD) -> io::Result<c::HANDLE> { fn write(handle_id: c::DWORD, data: &[u8]) -> io::Result<usize> { let handle = get_handle(handle_id)?; + // SAFETY: The handle returned from `get_handle` must be valid and non-null. let handle = unsafe { Handle::from_raw_handle(handle) }; ManuallyDrop::new(handle).write(data) } @@ -39,6 +40,7 @@ impl Stdin { impl io::Read for Stdin { fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> { let handle = get_handle(c::STD_INPUT_HANDLE)?; + // SAFETY: The handle returned from `get_handle` must be valid and non-null. let handle = unsafe { Handle::from_raw_handle(handle) }; ManuallyDrop::new(handle).read(buf) }