ada: Fix missing error on function call returning incomplete view

Testing for the presence of Non_Limited_View is not sufficient to detect
whether the nonlimited view has been analyzed because Build_Limited_Views
always sets the field on the limited view.  Instead the discriminant is
whether this nonlimited view is itself an incomplete type.

gcc/ada/

	* sem_ch4.adb (Analyze_Call): Adjust the test to detect the presence
	of an incomplete view of a type on a function call.

diff --git a/gcc/ada/sem_ch4.adb b/gcc/ada/sem_ch4.adb
index 8525565d88324c1601cfa3d9144b3f4aa4d4de97..3df539555f205ffd5330eecaf854ecf96b03434d 100644 (file)
--- a/gcc/ada/sem_ch4.adb
+++ b/gcc/ada/sem_ch4.adb
@@ -1539,8 +1539,14 @@ package body Sem_Ch4 is
 
                Set_Etype (N, Full_View (Etype (N)));
 
+            --  If the call is within a thunk, the nonlimited view should be
+            --  analyzed eventually (see also Analyze_Return_Type).
+
             elsif From_Limited_With (Etype (N))
               and then Present (Non_Limited_View (Etype (N)))
+              and then
+                (Ekind (Non_Limited_View (Etype (N))) /= E_Incomplete_Type
+                  or else Is_Thunk (Current_Scope))
             then
                Set_Etype (N, Non_Limited_View (Etype (N)));