2017-09-06  Ed Schonberg  <schonberg@adacore.com>

	* einfo.adb (Designated_Type): Use Is_Incomplete_Type to handle
	properly incomplete subtypes that may be created by explicit or
	implicit declarations.
	(Is_Base_Type): Take E_Incomplete_Subtype into account.
	(Subtype_Kind): Ditto.
	* sem_ch3.adb (Build_Discriminated_Subtype): Set properly the
	Ekind of a subtype of a discriminated incomplete type.
	(Fixup_Bad_Constraint): Use Subtype_Kind in all cases, including
	incomplete types, to preserve error reporting.
	(Process_Incomplete_Dependents): Do not create a subtype
	declaration for an incomplete subtype that is created internally.
	* sem_ch7.adb (Analyze_Package_Specification): Handle properly
	incomplete subtypes that do not require a completion, either
	because they are limited views, of they are generic actuals.

2017-09-06  Hristian Kirtchev  <kirtchev@adacore.com>

	* checks.adb (Insert_Valid_Check): Remove the
	suspicious manipulation of the Do_Range_Check flag as ths is
	no linger needed. Suppress validity check when analysing the
	validation variable.

2017-09-06  Philippe Gil  <gil@adacore.com>

	* g-debpoo.adb: adapt GNAT.Debug_Pools to allow safe thread
	GNATCOLL.Memory

2017-09-06  Bob Duff  <duff@adacore.com>

	* sem_elim.adb: Minor comment fix.

2017-09-06  Ed Schonberg  <schonberg@adacore.com>

	* sem_util.adb (Is_Object_Reference): A function call is an
	object reference, and thus attribute references for attributes
	that are functions (such as Pred and Succ) as well as predefined
	operators are legal in contexts that require an object, such as
	the prefix of attribute Img and the Ada2020 version of 'Image.

From-SVN: r251759