ada: Implicit_Dereference aspect specification for subtype incorrectly accepted

Implicit_Dereference is a type-specific aspect and therefore cannot be
legally specified as part of a subtype declaration.

gcc/ada/

	* sem_ch13.adb (Analyze_Aspect_Implicit_Dereference): Generate
	error if an aspect specification specifies the
	Implicit_Dereference aspect of a non-first subtype.

diff --git a/gcc/ada/sem_ch13.adb b/gcc/ada/sem_ch13.adb
index 0546aa37de789c6d49fe0ac378da9a26b39785fa..a55ba3c7bd9a7cbaf348179a68c93e7bf8677f17 100644 (file)
--- a/gcc/ada/sem_ch13.adb
+++ b/gcc/ada/sem_ch13.adb
@@ -1982,6 +1982,11 @@ package body Sem_Ch13 is
                   Error_Msg_N
                     ("aspect must apply to a type with discriminants", Expr);
 
+               elsif not Is_First_Subtype (E) then
+                  Error_Msg_N
+                    ("aspect not specifiable in a subtype declaration",
+                     Aspect);
+
                elsif not Is_Entity_Name (Expr) then
                   Error_Msg_N
                     ("aspect must name a discriminant of current type", Expr);