t.Errorf("found region start event for the wrong resource: wanted goroutine %d, got %s", goid, st.Resource)
			}
			if old, _ := st.Goroutine(); old != trace.GoNotExist && old != trace.GoUndetermined {
				t.Errorf("expected transition from GoNotExist or GoUndetermined, got transition from %s instead", old)
			}
		}
	default:
		t.Errorf("unexpected want start event type: %s", wantStart)
	}

	switch wantEnd {

				e.Errorf("transition to undetermined state for goroutine %d", id)
			}
			if v.seenSync && old == trace.GoUndetermined {
				e.Errorf("undetermined goroutine %d after first global sync", id)
			}
			if new == trace.GoNotExist && v.hasAnyRange(trace.MakeResourceID(id)) {
				e.Errorf("goroutine %d died with active ranges", id)
			}
			state, ok := v.gs[id]
			if ok {
				if old != state.state {

		}
		s = goStateTransition(GoID(e.base.args[0]), GoNotExist, status)
		s.Stack = Stack{table: e.table, id: stackID(e.base.args[1])}
	case go122.EvGoCreateSyscall:
		s = goStateTransition(GoID(e.base.args[0]), GoNotExist, GoSyscall)
	case go122.EvGoStart:
		s = goStateTransition(GoID(e.base.args[0]), GoRunnable, GoRunning)
	case go122.EvGoDestroy:
		s = goStateTransition(e.ctx.G, GoRunning, GoNotExist)

			if old == new {
				// Skip these events; they're not telling us anything new.
				break
			}

			// Handle transition out.
			g := s.gs[id]
			switch old {
			case GoUndetermined, GoNotExist:
				g = &GoroutineSummary{ID: id, goroutineSummary: &goroutineSummary{}}
				// If we're coming out of GoUndetermined, then the creation time is the
				// time of the last sync.
				if old == GoUndetermined {