c++: modules ICE with typename friend

A couple of xtreme-header-* modules tests began ICEing in C++23 mode
ever since r13-2650-g5d84a4418aa962 which introduced into <ranges> a
dependently scoped friend declaration:

  friend /* typename */ _OuterIter::value_type;

This happens because the streaming code assumes a TYPE_P friend must
be a class type, but here it's a TYPENAME_TYPE, which doesn't have
a TEMPLATE_INFO or CLASSTYPE_BEFRIENDING_CLASSES.  This patch tries
to correct this in a minimal way.

gcc/cp/ChangeLog:

	* module.cc (friend_from_decl_list): Don't consider
	CLASSTYPE_TEMPLATE_INFO for a TYPENAME_TYPE friend.
	(trees_in::read_class_def): Don't add to
	CLASSTYPE_BEFRIENDING_CLASSES for a TYPENAME_TYPE friend.

gcc/testsuite/ChangeLog:

	* g++.dg/modules/typename-friend_a.C: New test.
	* g++.dg/modules/typename-friend_b.C: New test.

0 files changed, 0 insertions, 0 deletions