Fix too-short variance slice in variances_of cycle recovery

xmakro · xmakro · commit c2c6cb43e85a · 2026-06-19T19:54:29.000-07:00
diff --git a/compiler/rustc_query_impl/src/handle_cycle_error.rs b/compiler/rustc_query_impl/src/handle_cycle_error.rs
@@ -104,7 +104,7 @@ pub(crate) fn variances_of<'tcx>(
     err: Diag<'_>,
 ) -> &'tcx [ty::Variance] {
     let _guar = err.delay_as_bug();
-    let n = tcx.generics_of(def_id).own_params.len();
+    let n = tcx.generics_of(def_id).count();
     tcx.arena.alloc_from_iter(iter::repeat_n(ty::Bivariant, n))
 }
 

Original file line number	Diff line number	Diff line change
`@@ -104,7 +104,7 @@ pub(crate) fn variances_of<'tcx>(`
`104`	`104`	`err: Diag<'_>,`
`105`	`105`	`) -> &'tcx [ty::Variance] {`
`106`	`106`	`let _guar = err.delay_as_bug();`
`107`		`- let n = tcx.generics_of(def_id).own_params.len();`
	`107`	`+ let n = tcx.generics_of(def_id).count();`
`108`	`108`	`tcx.arena.alloc_from_iter(iter::repeat_n(ty::Bivariant, n))`
`109`	`109`	`}`
`110`	`110`