--- a/gcc/ada/libgnat/a-coinve.adb	Thu Oct 25 07:37:49 2018 +0900
+++ b/gcc/ada/libgnat/a-coinve.adb	Thu Feb 13 11:34:05 2020 +0900
@@ -6,7 +6,7 @@
 --                                                                          --
 --                                 B o d y                                  --
 --                                                                          --
---          Copyright (C) 2004-2018, Free Software Foundation, Inc.         --
+--          Copyright (C) 2004-2019, Free Software Foundation, Inc.         --
 --                                                                          --
 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
 -- terms of the  GNU General Public License as published  by the Free Soft- --
@@ -324,7 +324,7 @@
            (Element => Container.Elements.EA (Position.Index),
             Control => (Controlled with TC))
          do
-            Lock (TC.all);
+            Busy (TC.all);
          end return;
       end;
    end Constant_Reference;
@@ -348,7 +348,7 @@
            (Element => Container.Elements.EA (Index),
             Control => (Controlled with TC))
          do
-            Lock (TC.all);
+            Busy (TC.all);
          end return;
       end;
    end Constant_Reference;
@@ -2586,7 +2586,7 @@
       TC : constant Tamper_Counts_Access := Container.TC'Unrestricted_Access;
    begin
       return R : constant Reference_Control_Type := (Controlled with TC) do
-         Lock (TC.all);
+         Busy (TC.all);
       end return;
    end Pseudo_Reference;
 
@@ -2718,7 +2718,7 @@
            (Element => Container.Elements.EA (Position.Index),
             Control => (Controlled with TC))
          do
-            Lock (TC.all);
+            Busy (TC.all);
          end return;
       end;
    end Reference;
@@ -2742,7 +2742,7 @@
            (Element => Container.Elements.EA (Index),
             Control => (Controlled with TC))
          do
-            Lock (TC.all);
+            Busy (TC.all);
          end return;
       end;
    end Reference;