It seems iOS 13 or 13.1 introduced a new top crash. Might be beyond our control but worth investigating if we can rerpro. Logs are in the Xcode organizer but here's an example:
Incident Identifier: D8AF1B19-0220-4A50-A7F0-576EDCFA237F
CrashReporter Key: eb2a014be1a9b4c5afdd7004397580f3a39c920f
Hardware Model: iPhone9,1
Process: Wikipedia [12639]
Path: /private/var/containers/Bundle/Application/F8117CA1-77A1-4C07-A735-8B6C47607451/Wikipedia.app/Wikipedia
Identifier: org.wikimedia.wikipedia
Version: 1673 (6.4.0)
AppStoreTools: 11A1002b
AppVariant: 1:iPhone9,1:12.2
Code Type: ARM-64 (Native)
Role: Foreground
Parent Process: launchd [1]
Coalition: org.wikimedia.wikipedia [3626]
Date/Time: 2019-10-30 14:03:15.0231 +0900
Launch Time: 2019-10-30 14:03:12.7870 +0900
OS Version: iPhone OS 13.1.3 (17A878)
Release Type: User
Baseband Version: 7.00.01
Report Version: 104
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Subtype: KERN_INVALID_ADDRESS at 0x0000026892448ec9
VM Region Info: 0x26892448ec9 is not in any region. Bytes after previous region: 2636879531722
REGION TYPE START - END [ VSIZE] PRT/MAX SHRMOD REGION DETAIL
MALLOC_NANO 0000000280000000-00000002a0000000 [512.0M] rw-/rwx SM=PRV
--->
UNUSED SPACE AT END
Termination Signal: Segmentation fault: 11
Termination Reason: Namespace SIGNAL, Code 0xb
Terminating Process: exc handler [12639]
Triggered by Thread: 0
Thread 0 name:
Thread 0 Crashed:
0 libobjc.A.dylib 0x00000001b6ced1a0 objc_msgSend + 32
1 UIKitCore 0x00000001ba881370 -[UICollectionViewData _prepareToLoadData] + 260 (UICollectionViewData.mm:339)
2 UIKitCore 0x00000001ba881be4 -[UICollectionViewData validateLayoutInRect:] + 104 (UICollectionViewData.mm:400)
3 UIKitCore 0x00000001ba853290 -[UICollectionView layoutSubviews] + 220 (UICollectionView.m:3921)
4 UIKitCore 0x00000001bb461270 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 2140 (UIView.m:16956)
5 QuartzCore 0x00000001bd94d5f8 -[CALayer layoutSublayers] + 284 (CALayer.mm:9582)
6 QuartzCore 0x00000001bd951e28 CA::Layer::layout_if_needed(CA::Transaction*) + 480 (CALayer.mm:9459)
7 QuartzCore 0x00000001bd95d894 CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 136 (CALayer.mm:2434)
8 QuartzCore 0x00000001bd8a69f0 CA::Context::commit_transaction(CA::Transaction*, double) + 304 (CAContextInternal.mm:1991)
9 QuartzCore 0x00000001bd8d0890 CA::Transaction::commit() + 676 (CATransactionInternal.mm:438)
10 QuartzCore 0x00000001bd8d1284 CA::Transaction::observer_callback(__CFRunLoopObserver*, unsigned long, void*) + 92 (CATransactionInternal.mm:883)
11 CoreFoundation 0x00000001b6f45c48 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 32 (CFRunLoop.c:1758)
12 CoreFoundation 0x00000001b6f40b34 __CFRunLoopDoObservers + 416 (CFRunLoop.c:1868)
13 CoreFoundation 0x00000001b6f41100 __CFRunLoopRun + 1308 (CFRunLoop.c:2910)
14 CoreFoundation 0x00000001b6f408bc CFRunLoopRunSpecific + 464 (CFRunLoop.c:3192)
15 GraphicsServices 0x00000001c0dac328 GSEventRunModal + 104 (GSEvent.c:2246)
16 UIKitCore 0x00000001bafd66d4 UIApplicationMain + 1936 (UIApplication.m:4753)
17 Wikipedia 0x0000000104a743a0 main + 132 (main.m:47)
18 libdyld.dylib 0x00000001b6dcb460 start + 4
Thread 1:
0 libsystem_pthread.dylib 0x00000001b6ce8ad8 start_wqthread + 0
Thread 2:
0 libsystem_pthread.dylib 0x00000001b6ce8ad8 start_wqthread + 0
Thread 3:
0 libsystem_pthread.dylib 0x00000001b6ce8ad8 start_wqthread + 0
Thread 4 name:
Thread 4:
0 libsystem_kernel.dylib 0x00000001b6d9f5f4 mach_msg_trap + 8
1 libsystem_kernel.dylib 0x00000001b6d9ea60 mach_msg + 72 (mach_msg.c:103)
2 CoreFoundation 0x00000001b6f46068 __CFRunLoopServiceMachPort + 216 (CFRunLoop.c:2575)
3 CoreFoundation 0x00000001b6f41188 __CFRunLoopRun + 1444 (CFRunLoop.c:2931)
4 CoreFoundation 0x00000001b6f408bc CFRunLoopRunSpecific + 464 (CFRunLoop.c:3192)
5 Foundation 0x00000001b7280994 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 228 (NSRunLoop.m:374)
6 Foundation 0x00000001b7280874 -[NSRunLoop(NSRunLoop) runUntilDate:] + 88 (NSRunLoop.m:421)
7 UIKitCore 0x00000001bb06e49c -[UIEventFetcher threadMain] + 152 (UIEventFetcher.m:637)
8 Foundation 0x00000001b73b10b0 __NSThread__start__ + 848 (NSThread.m:724)
9 libsystem_pthread.dylib 0x00000001b6ce51ec _pthread_start + 124 (pthread.c:895)
10 libsystem_pthread.dylib 0x00000001b6ce8aec thread_start + 8
Thread 5:
0 libsystem_pthread.dylib 0x00000001b6ce8ad8 start_wqthread + 0
Thread 6:
0 libsystem_pthread.dylib 0x00000001b6ce8ad8 start_wqthread + 0
Thread 7:
0 libsystem_pthread.dylib 0x00000001b6ce8ad8 start_wqthread + 0
Thread 0 crashed with ARM Thread State (64-bit):
x0: 0x000000028305ea00 x1: 0x00000001ee6d7800 x2: 0x00000001c438dd38 x3: 0x0000000104dc2c20
x4: 0x000000016b3dfda8 x5: 0x0000000000000030 x6: 0x0000000000000000 x7: 0x0000000000000000
x8: 0x00000001ee6d7000 x9: 0x0000000000000000 x10: 0x0000026892400ec9 x11: 0xcb09026892400ec9
x12: 0x0000026892448ec9 x13: 0x0000acb1c66aea00 x14: 0x00000000faee6000 x15: 0x00000000000001cc
x16: 0x00000001c66aea00 x17: 0x00000001ba891e3c x18: 0x0000000000000000 x19: 0x000000028305ea00
x20: 0x000000028305ea00 x21: 0x00000001ee6d272f x22: 0x0000000000000790 x23: 0x0000000000000000
x24: 0x0000000000000990 x25: 0x0000000000000020 x26: 0x0000000000000094 x27: 0x0000000000000060
x28: 0x00000001ee6d2a09 fp: 0x000000016b3dff40 lr: 0x00000001ba881370
sp: 0x000000016b3dff00 pc: 0x00000001b6ced1a0 cpsr: 0x20000000
esr: 0x92000004 (Data Abort) byte read Translation fault