only use rustc attr on nightly

lqd · lqd · commit 300da9a910ad · 2024-08-24T20:36:56.000Z
diff --git a/compiler/rustc_type_ir/src/search_graph/mod.rs b/compiler/rustc_type_ir/src/search_graph/mod.rs
@@ -287,7 +287,7 @@ impl<X: Cx> NestedGoals<X> {
         }
     }
 
-    #[rustc_lint_query_instability]
+    #[cfg_attr(feature = "nightly", rustc_lint_query_instability)]
     #[allow(rustc::potential_query_instability)]
     fn iter(&self) -> impl Iterator<Item = (X::Input, UsageKind)> + '_ {
         self.nested_goals.iter().map(|(i, p)| (*i, *p))

Original file line number	Diff line number	Diff line change
`@@ -287,7 +287,7 @@ impl<X: Cx> NestedGoals<X> {`
`287`	`287`	`}`
`288`	`288`	`}`
`289`	`289`
`290`		`- #[rustc_lint_query_instability]`
	`290`	`+ #[cfg_attr(feature = "nightly", rustc_lint_query_instability)]`
`291`	`291`	`#[allow(rustc::potential_query_instability)]`
`292`	`292`	`fn iter(&self) -> impl Iterator<Item = (X::Input, UsageKind)> + '_ {`
`293`	`293`	`self.nested_goals.iter().map(\|(i, p)\| (i, p))`