[gcc r12-5723] [Ada] Add contract to Ada.Task_Identification.Activation_Is_Complete

[Pierre-Marie de Rodat]

https://gcc.gnu.org/g:7e650bf84bf61e88f05ffbf39ca677a1e3d2714a

commit r12-5723-g7e650bf84bf61e88f05ffbf39ca677a1e3d2714a
Author: Piotr Trojanek <trojanek@adacore.com>
Date:   Wed Nov 17 14:24:25 2021 +0100

    [Ada] Add contract to Ada.Task_Identification.Activation_Is_Complete
    
    gcc/ada/
    
            * libgnarl/a-taside.ads (Activation_Is_Complete): Add
            precondition.

Diff:
---
 gcc/ada/libgnarl/a-taside.ads | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gcc/ada/libgnarl/a-taside.ads b/gcc/ada/libgnarl/a-taside.ads
index a3b1e94bd9d..682211cbf40 100644
--- a/gcc/ada/libgnarl/a-taside.ads
+++ b/gcc/ada/libgnarl/a-taside.ads
@@ -92,6 +92,7 @@ is
 
    function Activation_Is_Complete (T : Task_Id) return Boolean with
      Volatile_Function,
+     Pre    => T /= Null_Task_Id,
      Global => Tasking_State;
 
 private