use rustc_infer::infer::TyCtxtInferExt;
use rustc_lint::{LateContext, LateLintPass};
use rustc_middle::mir::FakeReadCause;
-use rustc_middle::ty::{self, TypeFoldable};
+use rustc_middle::ty::{self, TypeVisitable};
use rustc_session::{declare_lint_pass, declare_tool_lint};
use rustc_span::symbol::kw;
use rustc_span::{sym, Span};
diag.span_suggestion(
input.span,
"consider changing the type to",
- "&str".to_string(),
+ "&str",
Applicability::Unspecified,
);