ada: Crash checking accessibility level on private type

This patch fixes an issue in the compiler whereby calculating a static
accessibility level on a private type with an access discriminant resulted
in a compile time crash when No_Dynamic_Accessibility_Checks is enabled.

gcc/ada/

	* accessibility.adb:
	(Accessibility_Level): Replace call Get_Full_View with call to
	Full_View since Get_Full_View only works with incomplete types.

1 files changed, 5 insertions, 1 deletions

diff --git a/gcc/ada/accessibility.adb b/gcc/ada/accessibility.adb
index 47b3a7a..da4d1d9 100644
--- a/gcc/ada/accessibility.adb
+++ b/gcc/ada/accessibility.adb
@@ -2227,7 +2227,11 @@ package body Accessibility is
                   --  that of the type.
 
                   elsif Ekind (Def_Ent) = E_Discriminant then
-                     return Scope_Depth (Get_Full_View (Scope (Def_Ent)));
+                     return Scope_Depth
+                       (if Present (Full_View (Scope (Def_Ent))) then
+                           Full_View (Scope (Def_Ent))
+                        else
+                           Scope (Def_Ent));
                   end if;
                end if;