syscall.SIGBUS,  // invalid memory access (e.g., misaligned address)
		syscall.SIGFPE,  // math error, e.g., integer divide by zero
		syscall.SIGSEGV, // invalid memory access (e.g., write to read-only)
		syscall.SIGPIPE: // sent data to closed pipe or socket
		return true
	default:
		return false
	}

	/*  10 */ {_SigPanic + _SigUnblock, "SIGBUS: bus error"},
	/*  11 */ {_SigPanic + _SigUnblock, "SIGSEGV: segmentation violation"},
	/*  12 */ {_SigThrow, "SIGSYS: bad system call"},
	/*  13 */ {_SigNotify, "SIGPIPE: write to broken pipe"},
	/*  14 */ {_SigNotify, "SIGALRM: alarm clock"},
	/*  15 */ {_SigNotify + _SigKill, "SIGTERM: termination"},
	/*  16 */ {_SigNotify, "SIGUSR1: user-defined signal 1"},

		}
		// We have read what should be the server URL. 'hg serve' shouldn't need to
		// write anything else to stdout, but it's not a big deal if it does anyway.
		// Keep the stdout pipe open so that 'hg serve' won't get a SIGPIPE, but
		// actively discard its output so that it won't hang on a blocking write.
		wg.Add(1)
		go func() {
			io.Copy(io.Discard, r)
			wg.Done()
		}()

		u, err := url.Parse(strings.TrimSpace(line))

	_SIGABRT    = C.SIGABRT
	_SIGBUS     = C.SIGBUS
	_SIGFPE     = C.SIGFPE
	_SIGKILL    = C.SIGKILL
	_SIGUSR1    = C.SIGUSR1
	_SIGSEGV    = C.SIGSEGV
	_SIGUSR2    = C.SIGUSR2
	_SIGPIPE    = C.SIGPIPE
	_SIGALRM    = C.SIGALRM
	_SIGCHLD    = C.SIGCHLD
	_SIGCONT    = C.SIGCONT
	_SIGSTOP    = C.SIGSTOP
	_SIGTSTP    = C.SIGTSTP
	_SIGTTIN    = C.SIGTTIN
	_SIGTTOU    = C.SIGTTOU
	_SIGURG     = C.SIGURG

	expectSignal(t, err, syscall.SIGSEGV, 0)

	// SIGPIPE is never forwarded on darwin. See golang.org/issue/33384.
	if runtime.GOOS != "darwin" && runtime.GOOS != "ios" {
		// Test SIGPIPE forwarding
		cmd = exec.Command(bin[0], append(bin[1:], "3")...)

		out, err = cmd.CombinedOutput()
		if len(out) > 0 {
			t.Logf("%s", out)
		}
		expectSignal(t, err, syscall.SIGPIPE, 0)
	}
}

	_SIGUSR1:    {_SigNotify, "SIGUSR1: user-defined signal 1"},
	_SIGSEGV:    {_SigPanic + _SigUnblock, "SIGSEGV: segmentation violation"},
	_SIGUSR2:    {_SigNotify, "SIGUSR2: user-defined signal 2"},
	_SIGPIPE:    {_SigNotify, "SIGPIPE: write to broken pipe"},
	_SIGALRM:    {_SigNotify, "SIGALRM: alarm clock"},
	_SIGTERM:    {_SigNotify + _SigKill, "SIGTERM: termination"},
	_SIGCHLD:    {_SigNotify + _SigUnblock, "SIGCHLD: child status has changed"},

	SIGPOLL   = Signal(5)
	SIGURG    = Signal(6)
	SIGSTOP   = Signal(7)
	SIGFPE    = Signal(8)
	SIGKILL   = Signal(9)
	SIGBUS    = Signal(10)
	SIGSEGV   = Signal(11)
	SIGSYS    = Signal(12)
	SIGPIPE   = Signal(13)
	SIGALRM   = Signal(14)
	SIGTERM   = Signal(15)
	SIGUSR1   = Signal(16)
	SIGUSR2   = Signal(17)
	SIGABND   = Signal(18)
	SIGCONT   = Signal(19)
	SIGCHLD   = Signal(20)

	SIGLOST     = syscall.Signal(0x6)
	SIGMAX      = syscall.Signal(0xff)
	SIGMAX32    = syscall.Signal(0x3f)
	SIGMIGRATE  = syscall.Signal(0x23)
	SIGMSG      = syscall.Signal(0x1b)
	SIGPIPE     = syscall.Signal(0xd)
	SIGPOLL     = syscall.Signal(0x17)
	SIGPRE      = syscall.Signal(0x24)
	SIGPROF     = syscall.Signal(0x20)
	SIGPTY      = syscall.Signal(0x17)
	SIGPWR      = syscall.Signal(0x1d)

	SIGIOT     = syscall.Signal(0x6)
	SIGJVM1    = syscall.Signal(0x27)
	SIGJVM2    = syscall.Signal(0x28)
	SIGKILL    = syscall.Signal(0x9)
	SIGLOST    = syscall.Signal(0x25)
	SIGLWP     = syscall.Signal(0x21)
	SIGPIPE    = syscall.Signal(0xd)
	SIGPOLL    = syscall.Signal(0x16)
	SIGPROF    = syscall.Signal(0x1d)
	SIGPWR     = syscall.Signal(0x13)
	SIGQUIT    = syscall.Signal(0x3)
	SIGSEGV    = syscall.Signal(0xb)

	SIGILL    = syscall.Signal(0x4)
	SIGINFO   = syscall.Signal(0x1d)
	SIGINT    = syscall.Signal(0x2)
	SIGIO     = syscall.Signal(0x17)
	SIGIOT    = syscall.Signal(0x6)
	SIGKILL   = syscall.Signal(0x9)
	SIGPIPE   = syscall.Signal(0xd)
	SIGPROF   = syscall.Signal(0x1b)
	SIGQUIT   = syscall.Signal(0x3)
	SIGSEGV   = syscall.Signal(0xb)
	SIGSTOP   = syscall.Signal(0x11)
	SIGSYS    = syscall.Signal(0xc)