SnapKit SnapKit crash in iOS 11.0~11.1.2

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Issue Info

Info	Value
Platform	e.g. ios/osx/tvos
Platform Version	e.g. 11.0,11.1,11.1.2
SnapKit Version	e.g. 4.0
Integration Method	e.g. cocoapods

Issue Description

I‘m using SnapKit like this. It crashes randomly in iOS 11.0、11.1、11.1.2

weak var weakSelf = self
operationView.snp.makeConstraints { (make) -> Void in
            make.left.equalTo(weakSelf!.view)
            make.right.equalTo(weakSelf!.view)
            if #available(iOS 11.0, *) {
                make.bottom.equalTo(weakSelf!.view.safeAreaLayoutGuide.snp.bottom)
            } else {
                // Fallback on earlier versions
                 make.bottom.equalTo(weakSelf!.view.snp.bottom)
            }
            make.height.equalTo(kOperatingViewHeight)
        }

here's the error stack info


#0 Thread

NSInvalidArgumentException

-[UIView safeAreaLayoutGuide]: unrecognized selector sent to instance 0x1614269d0

CoreFoundation | _CFUserNotificationGetResponseValue + 148
-- | --
1 libobjc.A.dylib | objc_exception_throw + 56
2 CoreFoundation | -[NSTaggedPointerString lowercaseStringWithLocale:] + 420
3 CoreFoundation | ___CFLogCStringLegacy + 224
4 CoreFoundation | _CF_forwarding_prep_0 + 92
5 166 | __T07lottery27CPDigitalBaseViewControllerC15setupConstraitsyyFy7SnapKit15ConstraintMakerCcfU_Tf4gg_n (CPDigitalBaseViewController.swift:236)
6 166 | __T07lottery27CPDigitalBaseViewControllerC15setupConstraitsyyFy7SnapKit15ConstraintMakerCcfU_TA (CPDigitalBaseViewController.swift:0)
7 166 | makeConstraints (ConstraintMaker.swift:176)
8 166 | makeConstraints (ConstraintViewDSL.swift:0)
9 166| setupConstraits (CPDigitalBaseViewController.swift:0)
10 166 | setupConstraits (CPSDBaseVCtrl.swift:0)
11 166 | viewDidLoad (CPDigitalBaseViewController.swift:173)
12 166 | viewDidLoad (CPDigitalBaseViewController.swift:0)
13 166 | viewDidLoad (CPSDBaseVCtrl.swift:57)
14 166 | viewDidLoad (CPSDBaseVCtrl.swift:0)
15 166 | viewDidLoad (CPSSQVCtrl.swift:20)
16 UIKit | 0x00000001891bc000 + 85056
17 UIKit | 0x00000001891bc000 + 84036
18 166 | viewDidLoad (CPSwitchViewController.swift:95)
19 166| viewDidLoad (CPSwitchViewController.swift:0)
20 166 | viewDidLoad (CPSSQSwitchVCtrl.swift:0)
21 UIKit | 0x00000001891bc000 + 85056
22 UIKit | 0x00000001891bc000 + 184528
23 UIKit | 0x00000001891bc000 + 1867356
24 UIKit | 0x00000001891bc000 + 867904
25 UIKit | 0x00000001891bc000 + 867100
26 UIKit | 0x00000001891bc000 + 866948
27 UIKit | 0x00000001891bc000 + 66020
28 QuartzCore | 0x0000000186b50000 + 59796
29 QuartzCore | 0x0000000186b50000 + 38352
30 QuartzCore | 0x0000000186b50000 + 38032
31 QuartzCore | 0x0000000186b50000 + 35520
32 QuartzCore | 0x0000000186b50000 + 34848
33 UIKit | 0x00000001891bc000 + 77812
34 CoreFoundation | ___73-[_CFXPreferences(SearchListAdditions) replaceSearchList:withSearchList:]_block_invoke + 316
35 CoreFoundation | -[_CFXPreferences(SearchListAdditions) withSuiteSearchListForIdentifier:user:locked:perform:] + 28
36 CoreFoundation | -[CFPrefsSearchListSource deferredNotifyOfChangesFromDictionary:toDictionary:]+ 88
37 CoreFoundation | CFRunLoopRunSpecific + 384
38 GraphicsServices | GSEventRunModal + 180
39 UIKit | UIApplicationMain + 204
40 166 | main (AppDelegate.swift:45)
41 libdyld.dylib | 0x0000000183aec000 + 10424