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-rw-r--r--rust/pin-init/src/lib.rs6
1 files changed, 6 insertions, 0 deletions
diff --git a/rust/pin-init/src/lib.rs b/rust/pin-init/src/lib.rs
index 745cf534d239..1521500a46b1 100644
--- a/rust/pin-init/src/lib.rs
+++ b/rust/pin-init/src/lib.rs
@@ -32,6 +32,12 @@
//! will require the `std` feature, because stable compilers have neither `Box` nor `Arc` in no-std
//! mode.
//!
+//! ## Nightly needed for `unsafe-pinned` feature
+//!
+//! This feature enables the `Wrapper` implementation on the unstable `core::pin::UnsafePinned` type.
+//! This requires the [`unsafe_pinned` unstable feature](https://github.com/rust-lang/rust/issues/125735)
+//! and therefore a nightly compiler. Note that this feature is not enabled by default.
+//!
//! # Overview
//!
//! To initialize a `struct` with an in-place constructor you will need two things: