book: resources shared with init must also be `Send`

1 files changed, 8 insertions, 0 deletions

diff --git a/book/en/src/by-example/types-send-sync.md b/book/en/src/by-example/types-send-sync.md
index 8ec62e6..632946b 100644
--- a/book/en/src/by-example/types-send-sync.md
+++ b/book/en/src/by-example/types-send-sync.md
@@ -44,6 +44,14 @@ send operation where the initial value is sent from `idle`, which has the lowest
 priority of `0`, to a task with will run with a priority greater than or equal
 to `1`. Thus all late resources need to implement the `Send` trait.
 
+Sharing a resource with `init` can be used to implement late initialization, see
+example below. For that reason, resources shared with `init` must also implement
+the `Send` trait.
+
+``` rust
+{{#include ../../../../examples/shared-with-init.rs}}
+```
+
 ## `Sync`
 
 Similarly, [`Sync`] is a marker trait for "types for which it is safe to share