error[E0521]: borrowed data escapes outside of function
  --> compile_tests/props_safety.rs:8:5
   |
5  |   fn app(cx: Scope) -> Element {
   |          --
   |          |
   |          `cx` is a reference that is only valid in the function body
   |          has type `&'1 Scoped<'1>`
...
8  | /     render! {
9  | |         unsafe_child_component {
10 | |             borrowed: count
11 | |         }
12 | |     }
   | |     ^
   | |     |
   | |_____`cx` escapes the function body here
   |       argument requires that `'1` must outlive `'static`
   |
   = note: this error originates in the macro `render` (in Nightly builds, run with -Z macro-backtrace for more info)