Remove Clone impl from CycleError.

nnethercote · nnethercote · commit 1e52c89cfbe6 · 2026-03-12T12:15:39.000+11:00
It's unused.
diff --git a/compiler/rustc_middle/src/query/plumbing.rs b/compiler/rustc_middle/src/query/plumbing.rs
@@ -59,7 +59,7 @@ pub enum CycleErrorHandling {
     DelayBug,
 }
 
-#[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
`@@ -59,7 +59,7 @@ pub enum CycleErrorHandling {`
`59`	`59`	`DelayBug,`
`60`	`60`	`}`
`61`	`61`
`62`		`-#[derive(Clone, Debug)]`
	`62`	`+#[derive(Debug)]`
`63`	`63`	`pub struct CycleError<I = QueryStackFrameExtra> {`
`64`	`64`	`/// The query and related span that uses the cycle.`
`65`	`65`	`pub usage: Option<Spanned<QueryStackFrame<I>>>,`