gcc 15.2 is really picky about casting between ints of different sizes.

So subvert the warnings with a union.

Note that the exception is deliberatley unhandled: We want to crash out if there are high bits.

libgnucash/backend/sql/gnc-sql-column-table-entry.hpp

@@ -367,8 +367,26 @@ GncSqlColumnTableEntry::get_row_value_from_object(QofIdTypeConst obj_name,
     {
         QofAccessFunc getter = get_getter(obj_name);
         if (getter != nullptr)
-            result = reinterpret_cast<T>((getter)(const_cast<void*>(pObject),
+        {
+            if constexpr (sizeof(T) >= sizeof(void*))
+                result = reinterpret_cast<T>((getter)(const_cast<void*>(pObject),
                                                   nullptr));
+            else
+            {
+                union converter
+                {
+                    intptr_t whole;
+                    uint32_t upper;
+                    uint32_t lower;
+                };
+                converter conv;
+                conv.whole = reinterpret_cast<intptr_t>((getter)(const_cast<void*>(pObject),
+                                                                        nullptr));
+                if (conv.upper)
+                    throw std::runtime_error("Bits left over when converting pointer"); //crash out
+                result = conv.lower;
+            }
+        }
     }
     return result;
 }