Spontaneously call of already dropped closure when using Listen::use_field<F>

[photovoltex]

Sometimes a closure is accessed after being dropped. The provided test-project does produce the bug now and then.

From my current perspective it looks like a bug that is not often encountered in the wild. Will have to test it in an actual project to more accurately evaluate the severity of the bug.

For now it looks like a race condition where either the closure is hold to long in memory and hides the problem, or the listen event sometimes isn't detached fast enough and tries to call the dropped closure.

[photovoltex]

Output with new leptos version:

[Warning] [Signal::update] At Location { file: "/home/photovoltex/repo/tauri-interop/src/event/listen.rs", line: 118, col: 45 }, you’re trying to update a Signal<alloc::string::String> (defined at /home/photovoltex/repo/tauri-interop/src/event/listen.rs:111:36) that has already been disposed of. This is probably a logic error in a component that creates and disposes of scopes. If it does not cause any issues, it is safe to ignore this warning, which occurs only in debug mode. (frontend-70ef696a103500f1.js, line 652)

So this does confirm that it might be a racing condition.