[gcc r13-7846] ada: Fix internal error on instance in package body with -gnatn

[gcc r13-7846] ada: Fix internal error on instance in package body with -gnatn

[Eric Botcazou]

https://gcc.gnu.org/g:34e4d3b14006c7d3fba3ebfe96d44a5c435326a7

commit r13-7846-g34e4d3b14006c7d3fba3ebfe96d44a5c435326a7
Author: Eric Botcazou <ebotcazou@adacore.com>
Date:   Thu Jan 12 15:51:40 2023 +0100

    ada: Fix internal error on instance in package body with -gnatn
    
    This plugs a small loophole in the procedure responsible for attempting to
    hide entities that have been previously made public by the semantic analyzer
    in package bodies.
    
    gcc/ada/
    
            * sem_ch7.adb (Hide_Public_Entities): Use the same condition for
            subprogram bodies without specification as for those with one.

Diff:
---
 gcc/ada/sem_ch7.adb | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gcc/ada/sem_ch7.adb b/gcc/ada/sem_ch7.adb
index 7cb7c862d35..1f1fbd3c703 100644
--- a/gcc/ada/sem_ch7.adb
+++ b/gcc/ada/sem_ch7.adb
@@ -446,7 +446,11 @@ package body Sem_Ch7 is
                   else
                      Decl_Id := Defining_Entity (Decl);
 
+                     --  See the N_Subprogram_Declaration case below
+
                      if not Set_Referencer_Of_Non_Subprograms
+                       and then (not In_Nested_Instance
+                                  or else not Subprogram_Table.Get_First)
                        and then not Subprogram_Table.Get (Decl_Id)
                      then
                         --  We can reset Is_Public right away