[gcc r14-907] libstdc++: Add assertion to debug_allocator test

[Jonathan Wakely]

https://gcc.gnu.org/g:bf904527ab6de99106ae59c3957348006019c4cf

commit r14-907-gbf904527ab6de99106ae59c3957348006019c4cf
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Tue May 16 09:58:19 2023 +0100

    libstdc++: Add assertion to debug_allocator test
    
    libstdc++-v3/ChangeLog:
    
            * testsuite/ext/debug_allocator/check_deallocate_null.cc: Add
            assertion to ensure expected exception is throw.

Diff:
---
 libstdc++-v3/testsuite/ext/debug_allocator/check_deallocate_null.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libstdc++-v3/testsuite/ext/debug_allocator/check_deallocate_null.cc b/libstdc++-v3/testsuite/ext/debug_allocator/check_deallocate_null.cc
index 1f0a9eb0b61..c5bcafb04e9 100644
--- a/libstdc++-v3/testsuite/ext/debug_allocator/check_deallocate_null.cc
+++ b/libstdc++-v3/testsuite/ext/debug_allocator/check_deallocate_null.cc
@@ -31,7 +31,8 @@ int main()
 
   try
     {
-      __gnu_test::check_deallocate_null<allocator_type>(); 
+      __gnu_test::check_deallocate_null<allocator_type>();
+      VERIFY(false);
     }
   catch (std::runtime_error& obj)
     {