1error: unsupported &mut [T] element type: opaque C++ type is not supported yet
2 --> tests/ui/slice_unsupported.rs:6:17
3  |
46 |         fn f(_: &mut [Opaque]);
5  |                 ^^^^^^^^^^^^^
6
7error: needs a cxx::ExternType impl in order to be used as a slice element in &mut [Opaque]
8 --> tests/ui/slice_unsupported.rs:4:9
9  |
104 |         type Opaque;
11  |         ^^^^^^^^^^^
12