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-rw-r--r--src/libcore/task/wake.rs5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/libcore/task/wake.rs b/src/libcore/task/wake.rs
index 1f42d3e2690..a877e033bc6 100644
--- a/src/libcore/task/wake.rs
+++ b/src/libcore/task/wake.rs
@@ -29,6 +29,11 @@ pub struct RawWaker {
 ///
 /// The pointer passed to all functions inside the vtable is the `data` pointer
 /// from the enclosing [`RawWaker`] object.
+///
+/// The functions inside this struct are only intended be called on the `data`
+/// pointer of a properly constructed [`RawWaker`] object from inside the
+/// [`RawWaker`] implementation. Calling one of the contained functions using
+/// any other `data` pointer will cause undefined behavior.
 #[derive(PartialEq, Copy, Clone, Debug)]
 pub struct RawWakerVTable {
     /// This function will be called when the [`RawWaker`] gets cloned, e.g. when