1 files changed, 70 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/torture/pr65419.C b/gcc/testsuite/g++.dg/torture/pr65419.C
new file mode 100644
index 0000000000..fada262b5b
--- /dev/null
+++ b/gcc/testsuite/g++.dg/torture/pr65419.C
@@ -0,0 +1,70 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-std=c++14" } */
+
+enum expression_template_option { et_on };
+template <class, expression_template_option = et_on> class A;
+template <class, class, class, class = void, class = void> struct expression;
+template <class T> struct B { typedef const T &type; };
+template <class tag, class A1, class A2, class A3, class A4>
+struct B<expression<tag, A1, A2, A3, A4>> {
+  typedef expression<tag, A1, A2> type;
+};
+template <class tag, class Arg1, class Arg2>
+struct expression<tag, Arg1, Arg2> {
+  expression(Arg1 p1, const Arg2 &p2) : arg1(p1), arg2(p2) {}
+  typename B<Arg1>::type arg1;
+  typename B<Arg2>::type arg2;
+};
+template <class Backend> expression<int, int, A<Backend>> sin(A<Backend>) {
+  return expression<int, int, A<Backend>>(0, 0);
+}
+template <class tag, class A1, class A2, class A3, class A4>
+expression<int, int, expression<tag, A1, A2>>
+  asin(expression<tag, A1, A2, A3, A4> p1) {
+  return expression<int, int, expression<tag, A1, A2>>(0, p1);
+}
+template <class B, expression_template_option ET, class tag, class Arg1,
+	  class Arg2, class Arg3, class Arg4>
+expression<int, A<B>, expression<tag, Arg1, Arg2>>
+  operator+(A<B, ET>, expression<tag, Arg1, Arg2, Arg3, Arg4> p2) {
+  return expression<int, A<B>, expression<tag, Arg1, Arg2>>(0, p2);
+}
+template <class tag, class Arg1, class Arg2, class Arg3, class Arg4, class tag2,
+	  class Arg1b, class Arg2b, class Arg3b, class Arg4b>
+expression<int, expression<tag, Arg1, Arg2>, expression<tag2, Arg1b, Arg2b>>
+  operator*(expression<tag, Arg1, Arg2, Arg3, Arg4> p1,
+	    expression<tag2, Arg1b, Arg2b, Arg3b, Arg4b> p2) {
+  return expression<int, expression<tag, Arg1, Arg2>,
+		    expression<tag2, Arg1b, Arg2b>>(p1, p2);
+}
+template <class B> expression<int, A<B>, A<B>> operator/(A<B>, A<B>) {
+  return expression<int, A<B>, A<B>>(0, 0);
+}
+template <class tag, class Arg1, class Arg2, class Arg3, class Arg4, class V>
+void operator/(expression<tag, Arg1, Arg2, Arg3, Arg4>, V);
+template <class, expression_template_option> class A {
+public:
+  A() {}
+  template <class V> A(V) {}
+};
+template <class T, class Policy> void jacobi_recurse(T, T, Policy) {
+  T a, b, c;
+  (a+asin(b/c) * sin(a)) / 0.1;
+}
+template <class T, class Policy> void jacobi_imp(T p1, Policy) {
+  T x;
+  jacobi_recurse(x, p1, 0);
+}
+template <class T, class U, class V, class Policy>
+void jacobi_elliptic(T, U, V, Policy) {
+  jacobi_imp(static_cast<T>(0), 0);
+}
+template <class U, class T, class Policy> void jacobi_sn(U, T, Policy) {
+  jacobi_elliptic(static_cast<T>(0), 0, 0, 0);
+}
+template <class U, class T> void jacobi_sn(U, T p2) { jacobi_sn(0, p2, 0); }
+template <class T> void test_extra(T) {
+  T d;
+  jacobi_sn(0, d);
+}
+void foo() { test_extra(A<int>()); }