libos: Use Vector::shallow_copy() in ArgumentParser

libluna/include/luna/Vector.h

@@ -212,7 +212,7 @@ template <typename T> class Vector
     {
         Vector<T> other;
         TRY(other.try_reserve(m_capacity));
-        memcpy(other.m_data, m_data, m_size);
+        memcpy(other.m_data, m_data, m_size * sizeof(T));
         other.m_size = m_size;
         return other;
     }

libos/src/ArgumentParser.cpp

@@ -118,7 +118,7 @@ namespace os
 
         bool is_still_parsing_flags = true;
 
-        Vector<PositionalArgument> positional_args = TRY(m_positional_args.deep_copy());
+        Vector<PositionalArgument> positional_args = TRY(m_positional_args.shallow_copy());
 
         for (int i = 1; i < argc; i++)
         {