Expand description

The pub_use_of_private_extern_crate lint detects a specific situation of re-exporting a private extern crate.


extern crate core;
pub use core as reexported_core;



A public use declaration should not be used to publicly re-export a private extern crate. pub extern crate should be used instead.

This was historically allowed, but is not the intended behavior according to the visibility rules. This is a future-incompatible lint to transition this to a hard error in the future. See issue #34537 for more details.