是否有人通过以下堆栈跟踪发生崩溃（EXC_BAD_accESS）：
0 Object_isClass
22 UIApplicationmain
23 main
24 start
如果在堆栈跟踪中单击UIApplicationmain，则会得到以下信息：
UIKitCore`UIApplicationmain:
0x21a6ef8a4 <+0>: stp x24,x23,[sp,#-0x40]!
0x21a6ef8a8 <+4>: stp x22,x21,#0x10]
0x21a6ef8ac <+8>: stp x20,x19,#0x20]
0x21a6ef8b0 <+12>: stp x29,x30,#0x30]
0x21a6ef8b4 <+16>: add x29,sp,#0x30 ; =0x30
0x21a6ef8b8 <+20>: mov x20,x3
0x21a6ef8bc <+24>: mov x21,x1
0x21a6ef8c0 <+28>: mov x22,x0
0x21a6ef8c4 <+32>: mov x0,x2
0x21a6ef8c8 <+36>: bl 0x21ac17b68 ; symbol stub for: -[_UICloudSharingactivity _activitySupportsPromiseURLs]
0x21a6ef8cc <+40>: mov x19,x0
0x21a6ef8d0 <+44>: mov x0,x20
0x21a6ef8d4 <+48>: bl 0x21ac17b68 ; symbol stub for: -[_UICloudSharingactivity _activitySupportsPromiseURLs]
0x21a6ef8d8 <+52>: mov x20,x0
0x21a6ef8dc <+56>: mov w0,#0x168
0x21a6ef8e0 <+60>: movk w0,#0x2b87,lsl #16
0x21a6ef8e4 <+64>: mov w1,#0x32
0x21a6ef8e8 <+68>: mov x2,#0x0
0x21a6ef8ec <+72>: mov x3,#0x0
0x21a6ef8f0 <+76>: mov x4,#0x0
0x21a6ef8f4 <+80>: bl 0x21ac1779c ; symbol stub for: __66-[UICloudSharingController _deleteShareAfterDismissalWithoutSave:]_block_invoke_2
0x21a6ef8f8 <+84>: orr w0,wzr,#0x3
0x21a6ef8fc <+88>: orr w1,#0x3
0x21a6ef900 <+92>: mov x2,#-0x1
0x21a6ef904 <+96>: orr x4,xzr,#0x8000000000000000
0x21a6ef908 <+100>: mov w3,#0x0
0x21a6ef90c <+104>: bl 0x21ac175c8 ; symbol stub for: -[UIWebView webView:decidePolicyForNewWindowaction:request:newFrameName:decisionListener:]
0x21a6ef910 <+108>: adrp x23,52595
0x21a6ef914 <+112>: ldr w8,[x23,#0x364]
0x21a6ef918 <+116>: cbz w8,0x21a6ef9a0 ; <+252>
0x21a6ef91c <+120>: lsr w8,w8,#8
0x21a6ef920 <+124>: cmp w8,#0x201 ; =0x201
0x21a6ef924 <+128>: b.lo 0x21a6ef950 ; <+172>
0x21a6ef928 <+132>: bl 0x21ac17a48 ; symbol stub for: -[_UIShareParticipantDetails detailText]
0x21a6ef92c <+136>: mov x23,x0
0x21a6ef930 <+140>: mov x0,x22
0x21a6ef934 <+144>: mov x1,x21
0x21a6ef938 <+148>: mov x2,x19
0x21a6ef93c <+152>: mov x3,x20
0x21a6ef940 <+156>: bl 0x21a6ef9d0 ; _UIApplicationmainPreparations
0x21a6ef944 <+160>: mov x0,x23
0x21a6ef948 <+164>: bl 0x21ac17a3c ; symbol stub for: -[_UIShareParticipantDetails setParticipantID:]
0x21a6ef94c <+168>: b 0x21a6ef964 ; <+192>
0x21a6ef950 <+172>: mov x0,x22
0x21a6ef954 <+176>: mov x1,x21
0x21a6ef958 <+180>: mov x2,x19
0x21a6ef95c <+184>: mov x3,x20
0x21a6ef960 <+188>: bl 0x21a6ef9d0 ; _UIApplicationmainPreparations
0x21a6ef964 <+192>: adrp x8,52595
0x21a6ef968 <+196>: ldr x0,[x8,#0x328]
0x21a6ef96c <+200>: adrp x8,1577
0x21a6ef970 <+204>: add x1,x8,#0xad5 ; =0xad5
0x21a6ef974 <+208>: bl 0x21ac17b2c ; symbol stub for: CloudDocslibrary
0x21a6ef978 <+212>: mov x0,x20 <--- Exception bad access code 1
0x21a6ef97c <+216>: bl 0x21ac17b5c ; symbol stub for: -[_UICloudSharingactivity _documentSharingControllerDidDismiss:]
0x21a6ef980 <+220>: mov x0,x19
0x21a6ef984 <+224>: bl 0x21ac17b5c ; symbol stub for: -[_UICloudSharingactivity _documentSharingControllerDidDismiss:]
0x21a6ef988 <+228>: mov w0,#0x0
0x21a6ef98c <+232>: ldp x29,#0x30]
0x21a6ef990 <+236>: ldp x20,#0x20]
0x21a6ef994 <+240>: ldp x22,#0x10]
0x21a6ef998 <+244>: ldp x24,[sp],#0x40
0x21a6ef99c <+248>: ret
0x21a6ef9a0 <+252>: adrp x8,52593
0x21a6ef9a4 <+256>: ldr x8,#0xf40]
0x21a6ef9a8 <+260>: cmn x8,#0x1 ; =0x1
0x21a6ef9ac <+264>: b.ne 0x21a6ef9b8 ; <+276>
0x21a6ef9b0 <+268>: ldr w8,#0x364]
0x21a6ef9b4 <+272>: b 0x21a6ef91c ; <+120>
0x21a6ef9b8 <+276>: adrp x0,52593
0x21a6ef9bc <+280>: add x0,x0,#0xf40 ; =0xf40
0x21a6ef9c0 <+284>: adrp x1,41868
0x21a6ef9c4 <+288>: add x1,x1,#0x640 ; =0x640
0x21a6ef9c8 <+292>: bl 0x21ac17490 ; symbol stub for: -[UIWebView _webView:commitPreview:]
0x21a6ef9cc <+296>: b 0x21a6ef9b0 ; <+268>
看起来好像在尝试做一些CloudKit东西时崩溃了吗？这很奇怪，因为我们没有任何CloudKit设置...
我只在本地（通过Xcode运行时）看到此崩溃，而不是在我们的CI中崩溃。我们最近添加了一些CoreData用法，这可以某种方式关联吗？
似乎CloudKit的东西可能是一条红色的鲱鱼，确实是KVO崩溃，因为当我在控制台中运行“ bt”命令时，我得到了包含以下警告的回溯信息： KVO_IS_RetaINING_ALL_OBSERVERS_OF_THIS_OBJECT_IF_IT_CRASHES_AN_OBSERVER_WAS_OVERRELEASED_OR_SMASHED
在尝试跟踪KVO崩溃时，我一直看到此问题，因此从某种意义上说...可惜堆栈中没有更多信息！