[Ada] Fix assertion failure on functions with contracts

2020-06-10  Ghjuvan Lacambre  <lacambre@adacore.com>

gcc/ada/

	* par-ch6.adb (P_Subprogram): Make sure the specification
	belongs to a procedure.

diff --git a/gcc/ada/par-ch6.adb b/gcc/ada/par-ch6.adb
index a43d6735668e7184e43a7d8fb0c2f5b113011682..abf7d1052e34009a69dc90a27c0769020672739b 100644 (file)
--- a/gcc/ada/par-ch6.adb
+++ b/gcc/ada/par-ch6.adb
@@ -960,9 +960,12 @@ package body Ch6 is
 
          if Token = Tok_Is then
 
-            --  If the subprogram declaration already has a specification, we
-            --  can't define another.
-            if Null_Present (Specification (Decl_Node)) then
+            --  If the subprogram is a procedure and already has a
+            --  specification, we can't define another.
+
+            if Nkind (Specification (Decl_Node)) = N_Procedure_Specification
+              and then Null_Present (Specification (Decl_Node))
+            then
                Error_Msg_AP ("null procedure cannot have a body");
             end if;