[COMMITTED] ada: Crash on aggregate for tagged record with discriminants

[Marc Poulhiès]

From: Javier Miranda <miranda@adacore.com>

The frontend may crash processing an aggregate initializing
a derived tagged record type that has discriminants.

gcc/ada/

	* sem_aggr.adb
	(Resolve_Record_Aggregate): For aggregates of derived tagged
	record types with discriminants, when collecting components
	from ancestors, pass to subprogram Gather_Components the
	parent type. Required to report errors on wrong aggregate
	components.

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

---
 gcc/ada/sem_aggr.adb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/ada/sem_aggr.adb b/gcc/ada/sem_aggr.adb
index fd0779e66d7..edd495b8359 100644
--- a/gcc/ada/sem_aggr.adb
+++ b/gcc/ada/sem_aggr.adb
@@ -5632,7 +5632,7 @@ package body Sem_Aggr is
                end if;
 
                Record_Def := Type_Definition (Parent (Base_Type (Parent_Typ)));
-               Gather_Components (Empty,
+               Gather_Components (Parent_Typ,
                  Component_List (Record_Extension_Part (Record_Def)),
                  Governed_By   => New_Assoc_List,
                  Into          => Components,
-- 
2.40.0