[Ada] Crash on task declaration with Restriction_Warning (No_Tasking)

gcc/ada/

	* sem_prag.adb (Process_Restrictions_Or_Restriction_Warnings):
	when the restriction is a configuration pragma and specifies
	No_Tasking, a global flag is set to reject task declarations,
	and to prevent the construction of Master entities. The flag
	must not be set if the pragma is a Restriction_Warning, in which
	case task declarationns are allowed.

diff --git a/gcc/ada/sem_prag.adb b/gcc/ada/sem_prag.adb
index 9c57ee3..02cf0bc 100644 (file)
--- a/gcc/ada/sem_prag.adb
+++ b/gcc/ada/sem_prag.adb
@@ -10438,10 +10438,13 @@ package body Sem_Prag is
                      Add_To_Config_Boolean_Restrictions (No_Elaboration_Code);
                   end if;
 
-               --  Special processing for No_Tasking restriction placed in
-               --  a configuration pragmas file.
+               --  Special processing for No_Tasking restriction (not just a
+               --  warning) when it appears as a configuration pragmas.
 
-               elsif R_Id = No_Tasking and then No (Cunit (Main_Unit)) then
+               elsif R_Id = No_Tasking
+                 and then No (Cunit (Main_Unit))
+                 and then not Warn
+               then
                   Set_Global_No_Tasking;
                end if;