cust_core: Doctest failed

[ghost]

https://download.copr.fedorainfracloud.org/results/remilauzier/rust-cuda/fedora-rawhide-x86_64/03707783-rust-cust_core/builder-live.log.gz

running 3 tests
test src/lib.rs - _hidden::DeviceCopy (line 21) ... FAILED
test src/lib.rs - _hidden::DeviceCopy (line 34) - compile fail ... ok
test src/lib.rs - _hidden::DeviceCopy (line 44) ... FAILED

failures:

---- src/lib.rs - _hidden::DeviceCopy (line 21) stdout ----
error[E0432]: unresolved import cust
--> src/lib.rs:22:5
|
2 | use cust::DeviceCopy;
| ^^^^ use of undeclared crate or module cust

error: cannot determine resolution for the derive macro DeviceCopy
--> src/lib.rs:24:17
|
4 | #[derive(Clone, DeviceCopy)]
| ^^^^^^^^^^
|
= note: import resolution is stuck, try simplifying macro imports