isn't this a dangling pointer? about dioxus HOT 4 CLOSED

if the vec is extended when another use_hook is called, previous references will point to some invalid addrs ?

If we used references returned by vec then yes, but we use the pointer into the bump arena which is stable between vec pushes. Similar to Box::pin-ing the value and then returning the reference into the heap.

from dioxus.

Hooks get freed here:

        self.hook_arena.reset();
        self.hook_vals.get_mut().drain(..).for_each(|state| {
            let as_mut = unsafe { &mut *state };
            let boxed = unsafe { bumpalo::boxed::Box::from_raw(as_mut) };
            drop(boxed);
        });

If the hooks don't get freed (through a panic?) then it's a memory leak

from dioxus.

if the vec is extended when another use_hook is called, previous references will point to some invalid addrs ?

let state1 = use_hook(xxx)
...
// many use_hooks
// self.hook_vals extended
...
let staten = use_hook(xxx)

from dioxus.

Got it. I didn't look into it carefully.

                 let raw_box = unsafe { &mut **inn }; 

from dioxus.