Fix repeat anon const classification for min_generic_const_args

Author: InvalidPathException

compiler/rustc_hir_analysis/src/collect.rs

@@ -1577,8 +1577,6 @@ fn anon_const_kind<'tcx>(tcx: TyCtxt<'tcx>, def: LocalDefId) -> ty::AnonConstKin
             let parent_hir_node = tcx.hir_node(tcx.parent_hir_id(const_arg_id));
             if tcx.features().generic_const_exprs() {
                 ty::AnonConstKind::GCE
-            } else if tcx.features().min_generic_const_args() {
-                ty::AnonConstKind::MCG
             } else if let hir::Node::Expr(hir::Expr {
                 kind: hir::ExprKind::Repeat(_, repeat_count),
                 ..

tests/ui/const-generics/mgca/repeat-self-const.rs

@@ -0,0 +1,17 @@
+//@ check-pass
+#![expect(incomplete_features)]
+#![feature(min_generic_const_args)]
+
+struct S<const M: usize>();
+
+impl<const M: usize> S<M> {
+    const N: usize = M;
+
+    fn f() {
+        let arr = [0; Self::N + 1];
+    }
+}
+
+fn main() {
+    S::<3>::f();
+}