Remove Clone impl from CycleError.

nnethercote · nnethercote · commit 1d43a421b5ec · 2026-03-16T08:54:21.000+11:00
It's unused.
diff --git a/compiler/rustc_middle/src/query/plumbing.rs b/compiler/rustc_middle/src/query/plumbing.rs
@@ -50,7 +50,7 @@ pub enum ActiveKeyStatus<'tcx> {
     Poisoned,
 }
 
-#[derive(Clone, Debug)]
+#[derive(Debug)]
 pub struct CycleError<'tcx> {
     /// The query and related span that uses the cycle.
     pub usage: Option<Spanned<QueryStackFrame<'tcx>>>,

Original file line number	Diff line number	Diff line change
`@@ -50,7 +50,7 @@ pub enum ActiveKeyStatus<'tcx> {`
`50`	`50`	`Poisoned,`
`51`	`51`	`}`
`52`	`52`
`53`		`-#[derive(Clone, Debug)]`
	`53`	`+#[derive(Debug)]`
`54`	`54`	`pub struct CycleError<'tcx> {`
`55`	`55`	`/// The query and related span that uses the cycle.`
`56`	`56`	`pub usage: Option<Spanned<QueryStackFrame<'tcx>>>,`