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Description
I tried this code (https://github.com/rust-lang/rust/blob/a6ff925f8b5598a1f6d84964525baa1d4a08fd63/compiler/rustc_infer/src/infer/region_constraints/mod.rs#L545):
type Lrc = std::rc::Rc;
fn f(choice_regions: &Lrc<Vec<ty::Region<'tcx>>>)
I expected to see this happen: Clippy suggests Lrc<[ty::Region<'tcx>]>
Instead, this happened: Clippy suggests Rc<[ty::Region<'tcx>]>
The following errors were reported:
error[E0412]: cannot find type `Rc` in this scope
--> compiler/rustc_infer/src/infer/region_constraints/mod.rs:545:26
|
545 | choice_regions: &Rc<[ty::Region<'tcx>]>,
| ^^ not found in this scope
|
help: consider importing one of these items
|
3 | use crate::infer::combine::ast::mut_visit::process::imp::process_inner::sys::ext::net::sys_common::wtf8::Rc;
|
3 | use std::rc::Rc;
warning: usage of `Rc<T>` when T is a buffer type
--> compiler/rustc_infer/src/infer/region_constraints/mod.rs:545:26
|
545 | choice_regions: &Lrc<Vec<ty::Region<'tcx>>>,
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `Rc<[ty::Region<'tcx>]>`
|
= note: `#[warn(clippy::rc_buffer)]` on by default
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#rc_buffer
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cargo clippy -V
: clippy 0.0.212 (4760b8f 2020-10-25)