Remove Clone impl from CycleError.

nnethercote · nnethercote · commit 64c38b76b00b · 2026-03-12T08:39:25.000+11:00
It's unused.
diff --git a/compiler/rustc_middle/src/query/plumbing.rs b/compiler/rustc_middle/src/query/plumbing.rs
@@ -61,7 +61,7 @@ pub enum CycleErrorHandling {
     Stash,
 }
 
-#[derive(Clone, Debug)]
+#[derive(Debug)]
 pub struct CycleError<I = QueryStackFrameExtra> {
     /// The query and related span that uses the cycle.
     pub usage: Option<Spanned<QueryStackFrame<I>>>,

Original file line number	Diff line number	Diff line change
`@@ -61,7 +61,7 @@ pub enum CycleErrorHandling {`
`61`	`61`	`Stash,`
`62`	`62`	`}`
`63`	`63`
`64`		`-#[derive(Clone, Debug)]`
	`64`	`+#[derive(Debug)]`
`65`	`65`	`pub struct CycleError<I = QueryStackFrameExtra> {`
`66`	`66`	`/// The query and related span that uses the cycle.`
`67`	`67`	`pub usage: Option<Spanned<QueryStackFrame<I>>>,`