def failure = Try.<Integer>failure(new RuntimeException("failed"))
        expect:
        failure.map { it + 1 } == failure
    }

    def "fail during tryMap"() {
        def failure = new RuntimeException("failure")
        expect:
        Try.successful(10).tryMap { throw failure } == Try.failure(failure)
    }

    def "fail during map"() {
        def failure = new RuntimeException("failure")
        when:

     * 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);

    /**

func realSyscallNoError(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r uintptr)

func realSyscall(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r, errno uintptr)

func SyscallNoError(trap, a1, a2, a3 uintptr) (r1, r2 uintptr) {
	syscall.Entersyscall()
	r := realSyscallNoError(trap, a1, a2, a3, 0, 0, 0, 0, 0, 0)
	syscall.Exitsyscall()
	return r, 0
}

#include "textflag.h"
#include "funcdata.h"

//
// System call support for Plan 9
//

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

#define SYS_ERRSTR 41	/* from zsysnum_plan9.go */

#include "funcdata.h"

//
// System call support for AMD64, Darwin
//

// Trap # in AX, args in DI SI DX, return in AX DX

// func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno);
TEXT	·Syscall(SB),NOSPLIT,$0-56
	CALL	runtime·entersyscall<ABIInternal>(SB)
	MOVQ	a1+8(FP), DI
	MOVQ	a2+16(FP), SI
	MOVQ	a3+24(FP), DX
	MOVQ	trap+0(FP), AX	// syscall entry
	ADDQ	$0x2000000, AX
	SYSCALL
	JCC	ok

// rather than ABIInternal.

// func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
TEXT	·Syscall(SB),NOSPLIT,$0-28
	JMP	·syscallInternal(SB)

// func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)
TEXT	·Syscall6(SB),NOSPLIT,$0-40
	JMP	·syscall6Internal(SB)

// func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
TEXT	·RawSyscall(SB),NOSPLIT,$0-28

	errno = 0;
	r.r = syscall(trap, a1, a2, a3, a4, a5, a6, a7, a8, a9);
	r.err = errno;
	return r;
}

uintptr_t gccgoRealSyscallNoError(uintptr_t trap, uintptr_t a1, uintptr_t a2, uintptr_t a3, uintptr_t a4, uintptr_t a5, uintptr_t a6, uintptr_t a7, uintptr_t a8, uintptr_t a9)
  __asm__(GOSYM_PREFIX GOPKGPATH ".realSyscallNoError");

uintptr_t

	// Traps that we cannot be recovered.
	{_SigThrow, "sys: trap: debug exception"},
	{_SigThrow, "sys: trap: invalid opcode"},

	// We can recover from some memory errors in runtime·sigpanic.
	{_SigPanic, "sys: trap: fault read"},  // SIGRFAULT
	{_SigPanic, "sys: trap: fault write"}, // SIGWFAULT

	// We can also recover from math errors.
	{_SigPanic, "sys: trap: divide error"}, // SIGINTDIV

// rather than ABIInternal.

// func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
TEXT	·Syscall(SB),NOSPLIT,$0-28
	JMP	·syscallInternal(SB)

// func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)
TEXT	·Syscall6(SB),NOSPLIT,$0-40
	JMP	·syscall6Internal(SB)

// func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
TEXT	·RawSyscall(SB),NOSPLIT,$0-28

package unix

import "syscall"

func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err syscall.Errno) {
	return syscall.Syscall(trap, a1, a2, a3)
}
func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err syscall.Errno) {
	return syscall.Syscall6(trap, a1, a2, a3, a4, a5, a6)
}
func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err syscall.Errno) {
	return syscall.RawSyscall(trap, a1, a2, a3)
}