{
vlib_buffer_t *b = vlib_get_buffer (vm, bi);
vnet_buffer_opaque_t *vnb = vnet_buffer (b);
+ if (pool_is_free_index
+ (vm->trace_main.trace_buffer_pool, vlib_buffer_get_trace_index (b)))
+ {
+ // this buffer's trace is gone
+ b->flags &= ~VLIB_BUFFER_IS_TRACED;
+ return;
+ }
bool is_after_handoff = false;
if (vlib_buffer_get_trace_thread (b) != vm->thread_index)
{