cp/
	PR c++/58583
	* cp-tree.h (DECL_INSTANTIATING_NSDMI_P): New.
	* init.c (get_nsdmi): Check for DEFAULT_ARG in template case and
	protect it from recursive instantiation.

	testsuite/
	PR c++/58583
	* g++.dg/cpp0x/nsdmi-template14.C: New test.

From-SVN: r224502