Only show bytes that were actually used

src/arena_allocator.cpp

@@ -347,14 +347,7 @@ void ArenaAllocator::debug_dump(std::ostream &out, bool show_memory_map,
       size_t block_num = blocks.size() - i;
 
       // Calculate used bytes in this specific block
-      size_t block_used;
-      if (i == 0) {
-        // Current block - use offset
-        block_used = current_block_->offset;
-      } else {
-        // Previous blocks are fully used
-        block_used = b->size;
-      }
+      size_t block_used = b->offset;
 
       if (block_used == 0) {
         out << "Block #" << block_num << ": No content (empty)" << std::endl;