Paths to extension trait functions in diagnostics can be confusing

The following code compiles with a warning (on take function):

use std::ops::Deref;

pub trait MutexGuard<T>: Deref<Target = T> /*+ DerefMut<Target = T>*/ {
    fn set(&mut self, value: T);
    fn take(&self) -> Option<T>;
}

impl<T> MutexGuard<T> for tokio::sync::MutexGuard<'_, T> {
    fn set(&mut self, value: T) {
        *self.deref_mut() = value;
    }

    fn take(&self) -> Option<T> {
        tokio::sync::MutexGuard::take(self)
    }
}

warning: function cannot return without recursing
  --> src/lib.rs:13:5
   |
13 |     fn take(&self) -> Option<T> {
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot return without recursing
14 |         tokio::sync::MutexGuard::take(self)
   |         ----------------------------------- recursive call site
   |
   = help: a `loop` may express intention better if this is on purpose
   = note: `#[warn(unconditional_recursion)]` on by default

I specified a "full path" (tokio::sync::MutexGuard::take) to take function and it should use that path rather than using a trait.

$ rustc --version
rustc 1.78.0 (9b00956e5 2024-04-29)

Start with the provided src/lib.rs reproduction and the rustc 1.78.0 behavior. Trace how the fully qualified tokio::sync::MutexGuard::take path is resolved in this context, then verify that the warning no longer treats the call as recursive while preserving the unconditional-recursion diagnostic for genuinely recursive calls.