}
	}

	ctx := context.Background()
	oldtrace := &ClientTrace{
		ConnectStart: connectStart('O'),
	}
	ctx = WithClientTrace(ctx, oldtrace)
	newtrace := &ClientTrace{
		ConnectStart: connectStart('N'),
	}
	ctx = WithClientTrace(ctx, newtrace)
	trace := ContextClientTrace(ctx)

	buf.Reset()
	trace.ConnectStart("net", "addr")
	if got, want := buf.String(), "NO"; got != want {

	specs           []event.Spec
	events          []raw.Event
	gens            []*Generation
	validTimestamps bool

	// Expectation state.
	bad      bool
	badMatch *regexp.Regexp
}

// NewTrace creates a new trace.
func NewTrace() *Trace {
	ver := version.Go122
	return &Trace{
		names:           event.Names(ver.Specs()),
		specs:           ver.Specs(),
		validTimestamps: true,
	}
}