[gcc r15-1780] ada: Compiler accepts an illegal Unchecked_Access attribute reference

[Marc Poulhi?s via Gcc-cvs]

https://gcc.gnu.org/g:5621e907ffbfc5953568d90c14c0f57d871e8f59

commit r15-1780-g5621e907ffbfc5953568d90c14c0f57d871e8f59
Author: Steve Baird <ba...@adacore.com>
Date:   Thu Jun 13 15:18:31 2024 -0700

    ada: Compiler accepts an illegal Unchecked_Access attribute reference
    
    The compiler incorrectly accepts Some_Object'Unchecked_Access'Image.
    
    gcc/ada/
    
            * sem_attr.adb
            (Analyze_Image_Attribute.Check_Image_Type): Check for
            E_Access_Attribute_Type prefix type.

Diff:
---
 gcc/ada/sem_attr.adb | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/gcc/ada/sem_attr.adb b/gcc/ada/sem_attr.adb
index d56c25a79cc..0b0adac1126 100644
--- a/gcc/ada/sem_attr.adb
+++ b/gcc/ada/sem_attr.adb
@@ -1582,6 +1582,13 @@ package body Sem_Attr is
             then
                Error_Msg_Ada_2022_Feature ("nonscalar ''Image", Sloc (P));
                Error_Attr;
+
+            elsif Present (Image_Type)
+              and then Ekind (Image_Type) = E_Access_Attribute_Type
+            then
+               --  reject Some_Object'[Unchecked_]Access'[Wide_[Wide_]]Image
+               Error_Msg_N ("illegal Image attribute prefix", N);
+               Error_Attr;
             end if;
          end Check_Image_Type;