2017-09-18  Bob Duff  <duff@adacore.com>

	* sem_ch4.adb (Analyze_Qualified_Expression): Give an error if the type
	mark refers to the current instance. Set the type to Any_Type in that
	case, to avoid later crashes.

2017-09-18  Ed Schonberg  <schonberg@adacore.com>

	* exp_ch3.adb (Replace_Discriminant_References): New procedure,
	subsidiary of Build_Assignment, used to handle the initialization code
	for a mutable record component whose default value is an aggregate that
	sets the values of the discriminants of the components.

2017-09-18  Ed Schonberg  <schonberg@adacore.com>

	* gnat.dg/default_variants.adb: New testcase.

2017-09-18  Eric Botcazou  <ebotcazou@adacore.com>

	* sem_ch13.adb (Analyze_Attribute_Definition_Clause) <Address>: Mark
	the entity as being volatile for an overlay that toggles the scalar
	storage order.

2017-09-18  Fedor Rybin  <frybin@adacore.com>

	* doc/gnat_ugn/gnat_utility_programs.rst: Document that gnattest
	options -U main and --harness-only are not compatible.

From-SVN: r252913