for i := 0; i < len(vf); i++ {
		a := Abs(vf[i])
		if f := Log(a); log[i] != f {
			t.Errorf("Log(%g) = %g, want %g", a, f, log[i])
		}
	}
	if f := Log(10); f != Ln10 {
		t.Errorf("Log(%g) = %g, want %g", 10.0, f, Ln10)
	}
	for i := 0; i < len(vflogSC); i++ {
		if f := Log(vflogSC[i]); !alike(logSC[i], f) {
			t.Errorf("Log(%g) = %g, want %g", vflogSC[i], f, logSC[i])
		}
	}
}

	fingLabel := labelMap{"fing-label": "fing-value"}
	fingLabelStr := "\n# labels: " + fingLabel.String()
	orderedPrefix := []string{
		"\n50 @ ",
		"\n44 @", labelStr,
		"\n40 @",
		"\n36 @", labelStr,
		"\n10 @",
		"\n9 @", labelStr,
		"\n1 @"}
	if !containsInOrder(prof, append(orderedPrefix, selfLabelStr)...) {
		t.Errorf("expected sorted goroutine counts with Labels:\n%s", prof)
	}

		{`package n5b; var _ interface{m()} = nil`, `nil`, `interface{m()}`},
		{`package n6; import "unsafe"; var _ unsafe.Pointer = nil`, `nil`, `unsafe.Pointer`},

		{`package n10; var (x *int; _ = x == nil)`, `nil`, `*int`},
		{`package n11; var (x func(); _ = x == nil)`, `nil`, `func()`},
		{`package n12; var (x []byte; _ = x == nil)`, `nil`, `[]byte`},

		{`package n4; var _ chan int = nil`, `nil`, `untyped nil`},
		{`package n5; var _ interface{} = nil`, `nil`, `untyped nil`},
		{`package n6; import "unsafe"; var _ unsafe.Pointer = nil`, `nil`, `untyped nil`},

		{`package n10; var (x *int; _ = x == nil)`, `nil`, `untyped nil`},
		{`package n11; var (x func(); _ = x == nil)`, `nil`, `untyped nil`},
		{`package n12; var (x []byte; _ = x == nil)`, `nil`, `untyped nil`},