[COMMITTED 11/13] ada: Compiler accepts an illegal Unchecked_Access attribute reference

[Marc Poulhiès]

From: Steve Baird <ba...@adacore.com>

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.

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

---
 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;
 
-- 
2.45.2