1 files changed, 18 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/cpp1z/decomp42.C b/gcc/testsuite/g++.dg/cpp1z/decomp42.C
new file mode 100644
index 00000000000..22c68ebd3a5
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp1z/decomp42.C
@@ -0,0 +1,18 @@
+// PR c++/85210
+// { dg-do compile { target c++11 } }
+// { dg-options "" }
+
+struct A { int i; };
+
+template <int>
+void
+foo (int j)
+{
+  auto [j] = A{j};	// { dg-error "shadows a parameter" }
+}			// { dg-warning "decomposition declaration only available with" "" { target c++14_down } .-1 }
+
+void
+bar ()
+{
+  foo<0> (0);
+}