std::rc::Weak<ContextImpl>` cannot be sent between threads safely

[zhukui]

How to solve this question ? I want to use context in 'thread::spawn' block ! The error message is blow :

error[E0277]: std::rc::Weak<ContextImpl> cannot be sent between threads safely
--> src/event_channels.rs:154:32
|
154 | sender.send(move || {
| ^^^^ std::rc::Weak<ContextImpl> cannot be sent between threads safely
|
= help: within event_channels::EventChannels, the trait std::marker::Send is not implemented for std::rc::Weak<ContextImpl>
= note: required because it appears within the type nativeshell::Context