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Prevent MsgHdr::with_control with empty buffer causes error in macOS #507

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Prevent MsgHdr::with_control with empty buffer causes error in macOS #507

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7 changes: 5 additions & 2 deletions src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -639,8 +639,11 @@ impl<'addr, 'bufs, 'control> MsgHdr<'addr, 'bufs, 'control> {
/// Corresponds to setting `msg_control` and `msg_controllen` on Unix and
/// `Control` on Windows.
pub fn with_control(mut self, buf: &'control [u8]) -> Self {
let ptr = buf.as_ptr() as *mut _;
sys::set_msghdr_control(&mut self.inner, ptr, buf.len());
debug_assert!(
!buf.is_empty(),
"Empty control buffer might be a programming error"
);
sys::set_msghdr_control(&mut self.inner, buf.as_ptr() as *mut _, buf.len());
self
}

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