Cannot use iter_mut() on mutable CxxVector?

[NiceneNerd]

As far as I can tell, if you acquire a mutable vector from C++ as Pin<&mut CxxVector<T>>, it's counterintuitively not possible to use iter_mut() with it. For example, in my bridge:

fn GetArray(self: Pin<&mut Byml>) -> Pin<&mut CxxVector<Byml>>;

The result when I try to iterate using byml.GetArray().iter_mut():

error[E0596]: cannot borrow data in a dereference of `Pin<&mut CxxVector<ffi::Byml>>` as mutable
  --> src/byml/mod.rs:55:17
   |
55 |                 byml.GetArray()
   |                 ^^^^^^^^^^^^^^^ cannot borrow as mutable
   |
   = help: trait `DerefMut` is required to modify through a dereference, but it is not implemented for `Pin<&mut CxxVector<ffi::Byml>>````

Just to check, I also found it happens with more trivial cases like `Pin<&mut CxxVector<u8>>`.

[dtolnay]

Good catch, that method was accidentally uncallable. I published 1.0.25 with a fix to make it work on Pin<&mut CxxVector>.

[NiceneNerd]

Awesome, thanks for the quick fix