From: Eric Botcazou <ebotcazou@adacore.com>
Date: Fri, 29 Aug 2025 07:24:33 +0000 (+0200)
Subject: ada: Fix crash on iterator of type with Constant_Indexing aspect
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=fa714c16d45e56f27733f4be3eeb3070457a4667;p=thirdparty%2Fgcc.git

ada: Fix crash on iterator of type with Constant_Indexing aspect

This happens when the type returned by the indexing function is a private
type whose completion is derived from another private type, because the
Finalize_Address routine cannot correctly fetch the actual root type.

gcc/ada/ChangeLog:

	* exp_util.adb (Finalize_Address): In an untagged derivation, call
	Root_Type on the full view of the base type if the partial view is
	itself not a derived type.
	(Is_Untagged_Derivation): Minor formatting tweak.
---

diff --git a/gcc/ada/exp_util.adb b/gcc/ada/exp_util.adb
index 4135e24424d..78fb3167c82 100644
--- a/gcc/ada/exp_util.adb
+++ b/gcc/ada/exp_util.adb
@@ -6206,7 +6206,11 @@ package body Exp_Util is
             Utyp := Corresponding_Record_Type (Root_Type (Btyp));
 
          elsif Is_Implicit_Full_View (Utyp) then
-            Utyp := Underlying_Type (Root_Type (Btyp));
+            if Is_Derived_Type (Btyp) then
+               Utyp := Underlying_Type (Root_Type (Btyp));
+            else
+               Utyp := Underlying_Type (Root_Type (Full_View (Btyp)));
+            end if;
 
             if Is_Protected_Type (Utyp) then
                Utyp := Corresponding_Record_Type (Utyp);
@@ -10033,7 +10037,8 @@ package body Exp_Util is
    begin
       return (not Is_Tagged_Type (T) and then Is_Derived_Type (T))
                or else
-                 (Is_Private_Type (T) and then Present (Full_View (T))
+                 (Is_Private_Type (T)
+                   and then Present (Full_View (T))
                    and then not Is_Tagged_Type (Full_View (T))
                    and then Is_Derived_Type (Full_View (T))
                    and then Etype (Full_View (T)) /= T);