1 files changed, 29 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/opt/pr18683-1.C b/gcc/testsuite/g++.dg/opt/pr18683-1.C
new file mode 100644
index 000000000..847a4d3c6
--- /dev/null
+++ b/gcc/testsuite/g++.dg/opt/pr18683-1.C
@@ -0,0 +1,29 @@
+// PR middle-end/18683
+// { dg-do compile }
+// { dg-options "-O0" }
+
+template<typename _CharT>
+struct basic_ostream
+{
+  basic_ostream& operator<<(int __n);
+};
+
+extern basic_ostream<char>  cout;
+
+template<int> struct linear_congruential
+{
+  template<class CharT>
+  friend basic_ostream<CharT>&
+  operator<<(basic_ostream<CharT>& os,
+             const linear_congruential& lcg)
+  {
+    return os << 1;
+  }
+};
+
+void instantiate_all()
+{
+  linear_congruential<0> lcf;
+  cout << lcf;
+}
+