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[SR-15291] Concurrency: Crash when invoking async @objc function #57613

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mickeyl opened this issue Oct 7, 2021 · 6 comments
Open

[SR-15291] Concurrency: Crash when invoking async @objc function #57613

mickeyl opened this issue Oct 7, 2021 · 6 comments
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@mickeyl
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@mickeyl mickeyl commented Oct 7, 2021

Previous ID SR-15291
Radar None
Original Reporter @mickeyl
Type Bug
Environment

macOS Big Sur, Xcode 13, iOS 15

Additional Detail from JIRA
Votes 0
Component/s
Labels Bug
Assignee None
Priority Medium

md5: 6dd0e24a6fb0f8662c8211501fdd40f3

Issue Description:

Adding the `async` modifier to an `@objc` function crashes when invoking that function via a Notification observer.

The backtrace is here:

(lldb) bt
* thread #​6, queue = 'com.apple.root.default-qos', stop reason = EXC_BAD_ACCESS (code=EXC_I386_GPFLT)
    frame #​0: 0x000000010c647928 libobjc.A.dylib`objc_release + 8
    frame #​1: 0x000000010d3aba95 Foundation`-[NSConcreteNotification dealloc] + 49
    frame #​2: 0x000000010c6479f7 libobjc.A.dylib`objc_object::sidetable_release(bool, bool) + 177
  * frame #​3: 0x000000010c1d6b8a SR555`closure #​1 in ViewController.viewDidLoad(self=0x00007fda09807c40) at ViewController.swift:20:40
    frame #&#8203;4: 0x000000010c1d6c48 SR555`thunk for @escaping @callee_guaranteed () -> () at <compiler-generated>:0
    frame #&#8203;5: 0x000000010d9d3c0c libdispatch.dylib`_dispatch_client_callout + 8
    frame #&#8203;6: 0x000000010d9d6595 libdispatch.dylib`_dispatch_continuation_pop + 594
    frame #&#8203;7: 0x000000010d9eaea0 libdispatch.dylib`_dispatch_source_invoke + 2166
    frame #&#8203;8: 0x000000010d9d5ecd libdispatch.dylib`_dispatch_queue_override_invoke + 584
    frame #&#8203;9: 0x000000010d9e5b44 libdispatch.dylib`_dispatch_root_queue_drain + 403
    frame #&#8203;10: 0x000000010d9e65ec libdispatch.dylib`_dispatch_worker_thread2 + 196
    frame #&#8203;11: 0x00007fff6bfeb417 libsystem_pthread.dylib`_pthread_wqthread + 244
    frame #&#8203;12: 0x00007fff6bfea42f libsystem_pthread.dylib`start_wqthread + 15
(lldb) 

An example project to clone is here: https://github.com/mickeyl/swift-bugs – directory SR15291

@mickeyl
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@mickeyl mickeyl commented Nov 17, 2021

Same in 5.5.2-dev as per Xcode 13.2.0 beta 2.

@mickeyl
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@mickeyl mickeyl commented Dec 8, 2021

Likewise in 5.5.2-dev as per Xcode 13.2.0 RC.

@mickeyl
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@mickeyl mickeyl commented Mar 9, 2022

Still a problem in Xcode 13.3.0 RC.

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
@mickeyl
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@mickeyl mickeyl commented May 13, 2022

Still a problem in 5.6.1 as per Xcode 13.4 RC.

@mickeyl
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@mickeyl mickeyl commented Jun 9, 2022

Still a problem in 5.7 as per Xcode 14.0 Beta 1.

@shahla00
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@shahla00 shahla00 commented Jun 20, 2022

Do we know when it will be fixed? Any work arounds while it is being fixed?

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