Recently I've made 1 character mistake in my code and have hard time during searching what was the problem.
Basically I forgot to set dot near one of the frame modifiers and compiler did not warn me, but during app running I got 100% CPU and rocket increase of RAM (on real app). Feels like recursion, but no any hint in call stack inside Xcode on crash stop.
struct BadView: View {
var body: some View {
Color.red
frame(height: 36)
}
}
I would like to see at least warning for such cases. Problem may look simple on this small example, but if you added 1k+ lines after last compilation - searching this type of errors could be problematic when you have no idea what to search.
Kirow
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App crashes on startup (trying to init first view controller) on iOS 12.5.5 if built with latest xCode (13.2 - 13.3 beta), but works fine if built with xCode 13.1.
I do not own 12.5.5 device, but I received crash report that I symbolicated
OS Version: iPhone OS 12.5.5 (16H62)
Baseband Version: 10.80.02
Report Version: 104
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Exception Note: EXC_CORPSE_NOTIFY
Triggered by Thread: 0
Application Specific Information:
abort() called
Thread 0 name: Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0 libsystem_kernel.dylib 0x00000001eaa370dc __pthread_kill (in libsystem_kernel.dylib) + 8
1 libsystem_pthread.dylib 0x00000001eaab0094 pthread_kill$VARIANT$mp (in libsystem_pthread.dylib) + 380
2 libsystem_c.dylib 0x00000001ea98ff4c __abort (in libsystem_c.dylib) + 152
3 libsystem_c.dylib 0x00000001ea98feb4 __abort (in libsystem_c.dylib) + 0
4 libsystem_malloc.dylib 0x00000001eaa8a684 _malloc_put (in libsystem_malloc.dylib) + 0
5 libsystem_malloc.dylib 0x00000001eaa8a83c malloc_report (in libsystem_malloc.dylib) + 60
6 libsystem_malloc.dylib 0x00000001eaa7d49c free (in libsystem_malloc.dylib) + 532
7 libswiftCore.dylib 0x0000000218a84c68 _swift_release_dealloc (in libswiftCore.dylib) + 28
8 libswiftCore.dylib 0x0000000218a5bd50 destroy for IndexingIterator (in libswiftCore.dylib) + 44
9 libswiftCore.dylib 0x000000021894b3ec SetAlgebra.init<A>(_:) (in libswiftCore.dylib) + 660
10 libswiftDispatch.dylib 0x0000000218b6c720 protocol witness for SetAlgebra.init<A>(_:) in conformance OS_dispatch_queue.Attributes (in libswiftDispatch.dylib) + 36
11 Zodiac Touch 0x0000000100562538 default argument 2 of OS_dispatch_queue.init(label:qos:attributes:autoreleaseFrequency:target:) + 3106104 (<compiler-generated>:0)
12 Zodiac Touch 0x00000001005650b0 ZPDashboardViewController.init(collectionViewLayout:) + 3117232 (ZPDashboardViewController.swift:57)
ZPDashboardViewController.swift line 57:
class ZPDashboardViewController: UICollectionViewController {
...
private let queue = DispatchQueue(label: "provider") // <- line 57
...
And I don't understand why does it crash...
I've seen topic on swift forum and thought it was related - but seems that it is not. Because I have same crash with xCode 13.3 beta.
Is there any explanation for this issue?