re PR c++/78334 ([C++1z] P0127R2 related ICE: Segmentation fault)

	PR c++/78334

	* g++.dg/cpp1z/nontype-auto7.C: New.

From-SVN: r245174

gcc/testsuite/g++.dg/cpp1z/nontype-auto7.C

+// PR c++/78334
+// { dg-options -std=c++1z }
+
+template <auto> auto constexpr_string([](auto) {});
+void foo() { constexpr_string<0>(0); };