[COMMITTED] ada: Assertion failure on expansion of record with invariant

["Marc Poulhiès" <poulhies@adacore.com>]

From: Javier Miranda <miranda@adacore.com>

gcc/ada/

	* exp_util.adb (Process_Record_Component): Adjust assertion on the
	availablity of the invariant procedure; required because the
	invariant procedure is built by the expander, and hence it is not
	available compiling generic units or when the sources have errors,
	since expansion is then disabled.

Tested on x86_64-pc-linux-gnu, committed on master.

---
 gcc/ada/exp_util.adb | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/gcc/ada/exp_util.adb b/gcc/ada/exp_util.adb
index 0dafa1cd6be..5cfadc5245e 100644
--- a/gcc/ada/exp_util.adb
+++ b/gcc/ada/exp_util.adb
@@ -3324,7 +3324,13 @@ package body Exp_Util is
                   --  if it has invariants of its own or inherits class-wide
                   --  invariants from parent or interface types.
 
-                  pragma Assert (Present (Proc_Id));
+                  --  However, given that the invariant procedure is built by
+                  --  the expander, it is not available compiling generic units
+                  --  or when the sources have errors, since expansion is then
+                  --  disabled.
+
+                  pragma Assert (Present (Proc_Id)
+                    or else not Expander_Active);
 
                   --  Generate:
                   --    <Comp_Typ>Invariant (T (_object).<Comp_Id>);
@@ -3333,7 +3339,9 @@ package body Exp_Util is
                   --  assertions are disabled or Assertion_Policy Ignore is in
                   --  effect.
 
-                  if not Has_Null_Body (Proc_Id) then
+                  if Present (Proc_Id)
+                    and then not Has_Null_Body (Proc_Id)
+                  then
                      Append_New_To (Comp_Checks,
                        Make_Procedure_Call_Statement (Loc,
                          Name                   =>
-- 
2.40.0