c++: Add testcase for PR103338HEADtrunkmaster

The case in that PR used to ICE until commit f04dc89. This patch simply adds
the case to the testsuite.

Successfully tested on x86_64-pc-linux-gnu.

	PR c++/103388

gcc/testsuite/ChangeLog:

	* g++.dg/parse/crash73.C: New test.

1 files changed, 19 insertions, 0 deletions

diff --git a/gcc/testsuite/g++.dg/parse/crash73.C b/gcc/testsuite/g++.dg/parse/crash73.C
new file mode 100644
index 00000000000..97b8b5e8325
--- /dev/null
+++ b/gcc/testsuite/g++.dg/parse/crash73.C
@@ -0,0 +1,19 @@
+// PR c++/103338
+// { dg-do compile { target c++11 } }
+
+template<class...>
+struct zip_view {
+  struct Iterator;
+};
+
+template<class...>
+struct zip_transform_view;
+
+template<class... Views>
+struct zip_view<Views...>::Iterator { // { dg-error "no class template" }
+  template<class... Uiews>
+  template<bool>
+  friend class zip_transform_view<Uiews...>::Iterator;
+};
+
+zip_view<>::Iterator iter;