- Fixed snprintf format-truncation warning in utun_instance.c using pragma
- Fixed DEBUG_CATEGORY_ALL overflow warning using explicit ULL constant
- Fixed test_debug_categories.c using debug_category_t instead of int
- Fixed write() unused result warning in test_u_async_comprehensive.c
- Fixed incorrect init_connections() call in test_etcp_simple_traffic.c (was calling server_instance instead of client_instance)
- Fixed double free in timeout_heap_pop() when handling deleted elements
- Enhanced NULL pointer safety in uasync_print_resources() by removing complex heap manipulation
- Added debug logging to timeout_heap_pop() for better error tracking
Test results: test_etcp_simple_traffic now passes without double free errors
Evgeny