* mapping function to the value, otherwise returns
     * the {@code Try} representing the original failure.
     *
     * This is similar to {@link #tryMap(Function)} but propagates any exception the given function throws.
     */
    public abstract <U> Try<U> map(Function<? super T, U> f);

    /**

	s.g = getg()
	s.elem = unsafe.Pointer(addr)
	s.next = nil
	s.prev = nil
	s.waiters = 0

	var last *sudog
	pt := &root.treap
	for t := *pt; t != nil; t = *pt {
		if t.elem == unsafe.Pointer(addr) {
			// Already have addr in list.
			if lifo {
				// Substitute s in t's place in treap.
				*pt = s
				s.ticket = t.ticket
				s.acquiretime = t.acquiretime // preserve head acquiretime as oldest time

			return nil, false
		}
		if e.p.CompareAndSwap(p, nil) {
			return *p, true
		}
	}
}

// trySwap swaps a value if the entry has not been expunged.
//
// If the entry is expunged, trySwap returns false and leaves the entry
// unchanged.
func (e *entry) trySwap(i *any) (*any, bool) {
	for {
		p := e.p.Load()
		if p == expunged {
			return nil, false
		}

}

# Sets an EXIT trap.
# Args:
#   $1:... : the trap command.
#
# NOTE: this function is duplicated in configure-helper.sh, any changes here
# should be duplicated there as well.
function log-trap-push {
  local t="${*:1}"
  LOG_TRAP_STACK+=("${t}")
  # shellcheck disable=2064
  trap "${t}" EXIT
}

# Removes and restores an EXIT trap.
#

//go:nosplit
//go:norace
//go:linkname RawSyscall
func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno) {
	return RawSyscall6(trap, a1, a2, a3, 0, 0, 0)
}

//go:uintptrkeepalive
//go:nosplit
//go:norace
//go:linkname RawSyscall6
func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno) {
	var errno uintptr
	r1, r2, errno = runtimesyscall.Syscall6(trap, a1, a2, a3, a4, a5, a6)
	err = Errno(errno)
	return

package syscall

import (
	"internal/abi"
	"unsafe"
)

func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)
func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)

var dupTrampoline = abi.FuncPCABI0(libc_dup2_trampoline)

const _F_DUP2FD_CLOEXEC = F_DUP2FD_CLOEXEC

func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)
func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)

// Implemented in asm_solaris_amd64.s.

import (
	"unsafe"
)

func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)
func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
func RawSyscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)

// Implemented in runtime/syscall_aix.go.

	r1, r2, errno := syscall.Syscall6(trap, a1, a2, a3, a4, a5, a6)
	if GOARCH == "ppc64" || GOARCH == "ppc64le" {
		// TODO(https://go.dev/issue/51192 ): ppc64 doesn't use r2.
		r2 = 0
	}
	if errno != 0 {
		releasem(getg().m)
		allocmLock.unlock()
		startTheWorld(stw)
		return r1, r2, errno
	}

	perThreadSyscall = perThreadSyscallArgs{
		trap: trap,
		a1:   a1,
		a2:   a2,
		a3:   a3,

var sigtable = [...]sigTabT{
	0:           {0, "SIGNONE: no trap"},
	_SIGHUP:     {_SigNotify + _SigKill, "SIGHUP: terminal line hangup"},
	_SIGINT:     {_SigNotify + _SigKill, "SIGINT: interrupt"},
	_SIGQUIT:    {_SigNotify + _SigThrow, "SIGQUIT: quit"},
	_SIGILL:     {_SigThrow + _SigUnblock, "SIGILL: illegal instruction"},
	_SIGTRAP:    {_SigThrow + _SigUnblock, "SIGTRAP: trace trap"},
	_SIGABRT:    {_SigNotify + _SigThrow, "SIGABRT: abort"},