New Sonyflake MachineID error

[kevinmiao]

an error occurred when I new Sonyflake.
the file is github.com/sony/[email protected]/sonyflake.go.

i'm use MacOs 14.4.1.

After debugging, I found that the isPrivateIPv4() check ip error under lower16BitPrivateIP() method.
i not init MachineID when i new Sonyflake, so it will run this code :
var err error if st.MachineID == nil { sf.machineID, err = lower16BitPrivateIP(defaultInterfaceAddrs) } else { sf.machineID, err = st.MachineID() } if err != nil { return nil, err }

error Info
`
panic: runtime error: invalid memory address or nil pointer dereference [recovered]
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x11a1e92]

goroutine 6 [running]:
testing.tRunner.func1.2({0x1265300, 0x14d52d0})
/usr/local/go/src/testing/testing.go:1545 +0x238
testing.tRunner.func1()
/usr/local/go/src/testing/testing.go:1548 +0x397
panic({0x1265300?, 0x14d52d0?})
/usr/local/go/src/runtime/panic.go:914 +0x21f
github.com/sony/sonyflake.(*Sonyflake).NextID(0x0)
/Users/pkg/mod/github.com/sony/[email protected]/sonyflake.go:116 +0x32

`

[YoshiyukiMineo]

// NewSonyflake returns nil in the following cases:
// - Settings.StartTime is ahead of the current time.
// - Settings.MachineID returns an error.
// - Settings.CheckMachineID returns false.

So, if you would like to check the error, you should use func New(st Settings) (*Sonyflake, error) instead of NewSonyflake.