Remove Clone impl from CycleError.

nnethercote · nnethercote · commit bd3ad2f8ddba · 2026-03-11T15:36:56.000+11:00
It's unused.
diff --git a/compiler/rustc_middle/src/query/plumbing.rs b/compiler/rustc_middle/src/query/plumbing.rs
@@ -62,7 +62,7 @@ pub enum CycleErrorHandling {
     Stash,
 }
 
-#[derive(Clone, Debug)]
+#[derive(Debug)]
 pub struct CycleError<I = QueryStackFrameExtra> {
     /// The query that uses the cycle, and the span corresponding to the reason for which the query
     /// was required.

Original file line number	Diff line number	Diff line change
`@@ -62,7 +62,7 @@ pub enum CycleErrorHandling {`
`62`	`62`	`Stash,`
`63`	`63`	`}`
`64`	`64`
`65`		`-#[derive(Clone, Debug)]`
	`65`	`+#[derive(Debug)]`
`66`	`66`	`pub struct CycleError<I = QueryStackFrameExtra> {`
`67`	`67`	`/// The query that uses the cycle, and the span corresponding to the reason for which the query`
`68`	`68`	`/// was required.`