Memos can give out of date values

[ealmloff]

Problem

You can read an out of date value from a memo if you update a dependency and then immediately read the memo

Steps To Reproduce

1. Create a memo
2. Update a state the memo depends on
3. Read an out of date value from the memo

use dioxus::prelude::*;

fn main() {
    launch(app);
}

fn app() -> Element {
    let mut count = use_signal(|| 0);

    let mut signal = use_signal(|| 0);
    let memo = use_memo({
        to_owned![counter];
        move || {
            counter.borrow_mut().effect += 1;
            println!("Signal: {:?}", signal);
            signal()
        }
    });
    assert_eq!(memo(), 0);
    signal += 1;
    assert_eq!(memo(), 1);

    None
}

Expected behavior

Memos should always have up to date values

Screenshots

If applicable, add screenshots to help explain your problem.

Environment:

• Dioxus version: master
• Rust version: nightly
• OS info: MacOS
• App platform: hooks

Questionnaire

• [ ] I'm interested in fixing this myself but don't know where to start
• [ ] I would like to fix and I have a solution
• [ ] I don't have time to fix this right now, but maybe later