add compile test for unsound case

packages/core/compile_tests/props_safety.rs

@@ -0,0 +1,32 @@
+use dioxus::prelude::*;
+
+fn main() {}
+
+fn app(cx: Scope) -> Element {
+    let count: &RefCell<Vec<Element>> = cx.use_hook(|| RefCell::new(Vec::new()));
+
+    render! {
+        unsafe_child_component {
+            borrowed: count
+        }
+    }
+}
+
+#[derive(Props)]
+struct Testing<'a> {
+    borrowed: &'a RefCell<Vec<Element<'a>>>,
+}
+
+fn unsafe_child_component<'a>(cx: Scope<'a, Testing<'a>>) -> Element<'a> {
+    let Testing { borrowed } = cx.props;
+    let borrowed_temporary_data =
+        cx.use_hook(|| String::from("This data is only valid for the lifetime of the child"));
+
+    borrowed
+        .borrow_mut()
+        .push(render! {"{borrowed_temporary_data}"});
+
+    cx.render(rsx! {
+        div { "Hello, world!" }
+    })
+}