Drag and drop blocks: Crashes on iOS related to JSI

[fluiddot]

Description

On WP-iOS 19.9.0.0, we identified a crash caused by react-native-reanimated and JSI when opening and closing the editor several times. This issue was hard to reproduce, as it looked like that only happened on specific devices and/or OS versions, but we managed to reproduce it almost consistently and released a hotfix (WP-iOS 19.9.1.0) to address it (reference).

However, after releasing the hotfix, we noticed that we're still getting crashes related to JSI, although the number is quite lower than the original issue. There's no clue yet about what's causing the crash, so we'd need to investigate it further.

Crash reports

• Sentry event - EXC_BAD_ACCESS (NOTE: This event is grouping non-related events, so when checking the stack trace verify that is related to PostPostViewController)

• Sentry event - NSt3__112system_errorE
• Sentry event - N8facebook3jsi7JSErrorE
• Sentry event - JSCRuntime destroyed with a dangling API object

UPDATE: We have identified another issue with Reanimated on Android that might be related to this one:

• App crashed when scrolling down in the app's editor wordpress-mobile/WordPress-Android#16675

Step-by-step reproduction instructions

We haven't found yet a way to reproduce it, hence no reproduction instructions can be provided.

Expected behaviour

We shouldn't get crash reports related to the react-native-reanimated library or JSI.

Actual behaviour

We are receiving crash reports related to react-native-reanimated and JSI.

Screenshots or screen recording (optional)

N/A

WordPress information

• WordPress version: N/A
• Gutenberg version: N/A
• Are all plugins except Gutenberg deactivated? N/A
• Are you using a default theme (e.g. Twenty Twenty-One)? N/A

Device information

• Device: N/A
• Operating system: N/A
• WordPress app version: WP-IOS 19.9.1.0

[hypest]

👋 @fluiddot! Is this in progress perhaps? Asking so we move the status accordingly. Thanks!

[fluiddot]

👋 @fluiddot! Is this in progress perhaps? Asking so we move the status accordingly. Thanks!

@hypest Nope, this task hasn't been tackled yet. However, it would be great if we could take a look sooner than later, as it's causing some of the top 5 crashes in the WordPress-iOS app. Actually, I'm thinking to focus on this over other tasks I'm currently working on related to integration tests, wdyt?

[hypest]

Thanks Carlos! Yeah, makes sense to focus on this since this is a crash situation. 👍

[fluiddot]

I performed a deeper analysis of the crashes in an effort to better identify the culprit:

EXC_BAD_ACCESS - Attempted to dereference garbage pointer

• Sentry event: https://sentry.io/share/issue/2c25a0fe197b414f9f4725654dc40d8a/
• Affected app versions: 19.9.1.0 and newer
• Stacktrace insights: The crash is happening during React Native environment destruction in most cases, specifically when destroying the JSI executor (destroy function: ~JSIExecutor).
• User action insights: The last user actions that are registered in the Sentry event before the crash are publishButtonTappedWithSender and after that one, publish or closeWasPressedWithSender. So, looks like the crash is somehow related to closing the editor, which is actually aligned with the following stack traces and the JSI executor destruction.

Stacktraces

The following one is the most frequent stack trace I found so dar, which occurs during destruction:

Click here to display the stack trace

0   WordPress                       0x201dc9e58         [inlined] std::__1::__function::__value_func<T>::~__value_func (functional:1846)
1   WordPress                       0x201dc9e58         [inlined] std::__1::__function::__value_func<T>::~__value_func (functional:1842)
2   WordPress                       0x201dc9e58         [inlined] std::__1::function<T>::~function (functional:2547)
3   WordPress                       0x201dc9e58         [inlined] std::__1::function<T>::~function (functional:2547)
4   WordPress                       0x201dc9e58         [inlined] std::__1::allocator<T>::destroy (memory:921)
5   WordPress                       0x201dc9e58         [inlined] std::__1::allocator_traits<T>::destroy<T> (allocator_traits.h:307)
6   WordPress                       0x201dc9e58         std::__1::__deque_base<T>::clear (deque:1249)
7   WordPress                       0x201dc9da8         std::__1::__deque_base<T>::~__deque_base (deque:1186)
8   WordPress                       0x201dc9d08         [inlined] std::__1::deque<T>::~deque (deque:1268)
9   WordPress                       0x201dc9d08         [inlined] std::__1::deque<T>::~deque (deque:1268)
10  WordPress                       0x201dc9d08         [inlined] std::__1::queue<T>::~queue (queue:206)
11  WordPress                       0x201dc9d08         [inlined] std::__1::queue<T>::~queue (queue:206)
12  WordPress                       0x201dc9d08         [inlined] reanimated::Queue<T>::~Queue (Scheduler.h:20)
13  WordPress                       0x201dc9d08         [inlined] reanimated::Queue<T>::~Queue (Scheduler.h:20)
14  WordPress                       0x201dc9d08         reanimated::Scheduler::~Scheduler (Scheduler.cpp:31)
15  WordPress                       0x201b6ffdc         [inlined] std::__1::__shared_count::__release_shared (memory:2506)
16  WordPress                       0x201b6ffdc         [inlined] std::__1::__shared_weak_count::__release_shared (memory:2548)
17  WordPress                       0x201b6ffdc         std::__1::shared_ptr<T>::~shared_ptr (memory:3238)
18  WordPress                       0x201db6dd0         [inlined] std::__1::shared_ptr<T>::~shared_ptr (memory:3236)
19  WordPress                       0x201db6dd0         reanimated::REAIOSErrorHandler::~REAIOSErrorHandler (REAIOSErrorHandler.h:20)
20  WordPress                       0x201b6ffdc         [inlined] std::__1::__shared_count::__release_shared (memory:2506)
21  WordPress                       0x201b6ffdc         [inlined] std::__1::__shared_weak_count::__release_shared (memory:2548)
22  WordPress                       0x201b6ffdc         std::__1::shared_ptr<T>::~shared_ptr (memory:3238)
23  WordPress                       0x201daa350         [inlined] std::__1::shared_ptr<T>::~shared_ptr (memory:3236)
24  WordPress                       0x201daa350         reanimated::RuntimeManager::~RuntimeManager (RuntimeManager.h:36)
25  WordPress                       0x201dac32c         reanimated::NativeReanimatedModule::~NativeReanimatedModule (NativeReanimatedModule.h:25)
26  WordPress                       0x201b6ffdc         [inlined] std::__1::__shared_count::__release_shared (memory:2506)
27  WordPress                       0x201b6ffdc         [inlined] std::__1::__shared_weak_count::__release_shared (memory:2548)
28  WordPress                       0x201b6ffdc         std::__1::shared_ptr<T>::~shared_ptr (memory:3238)
29  WordPress                       0x202190150         [inlined] std::__1::shared_ptr<T>::~shared_ptr (memory:3236)
30  WordPress                       0x202190150         [inlined] facebook::jsc::detail::HostObjectProxyBase::~HostObjectProxyBase (JSCRuntime.cpp:695)
31  WordPress                       0x202190150         [inlined] facebook::jsc::JSCRuntime::createObject::HostObjectProxy::~HostObjectProxy (JSCRuntime.cpp:712)
32  WordPress                       0x202190150         [inlined] facebook::jsc::JSCRuntime::createObject::HostObjectProxy::~HostObjectProxy (JSCRuntime.cpp:712)
33  WordPress                       0x202190150         facebook::jsc::JSCRuntime::createObject::HostObjectProxy::finalize (JSCRuntime.cpp:817)
34  JavaScriptCore                  0x35dcec8ac         JSC::JSCallbackObject<T>::destroy
35  JavaScriptCore                  0x35e332654         JSC::PreciseAllocation::sweep
36  JavaScriptCore                  0x35e32a6e8         JSC::MarkedSpace::lastChanceToFinalize
37  JavaScriptCore                  0x35e2f5890         JSC::Heap::lastChanceToFinalize
38  JavaScriptCore                  0x35e972fc0         JSC::VM::~VM
39  JavaScriptCore                  0x35e7fb4d0         JSC::JSLockHolder::~JSLockHolder
40  JavaScriptCore                  0x35dcfed4c         JSGlobalContextRelease
41  WordPress                       0x20218d758         facebook::jsc::JSCRuntime::~JSCRuntime (JSCRuntime.cpp:391)
42  WordPress                       0x20218d858         [inlined] facebook::jsc::JSCRuntime::~JSCRuntime (JSCRuntime.cpp:383)
43  WordPress                       0x20218d858         facebook::jsc::JSCRuntime::~JSCRuntime (JSCRuntime.cpp:383)
44  WordPress                       0x201b6ffdc         [inlined] std::__1::__shared_count::__release_shared (memory:2506)
45  WordPress                       0x201b6ffdc         [inlined] std::__1::__shared_weak_count::__release_shared (memory:2548)
46  WordPress                       0x201b6ffdc         std::__1::shared_ptr<T>::~shared_ptr (memory:3238)
47  WordPress                       0x20219ab38         [inlined] std::__1::shared_ptr<T>::~shared_ptr (memory:3236)
48  WordPress                       0x20219ab38         facebook::react::JSIExecutor::~JSIExecutor (JSIExecutor.h:71)
49  WordPress                       0x20219aa24         [inlined] facebook::react::JSIExecutor::~JSIExecutor (JSIExecutor.h:71)
50  WordPress                       0x20219aa24         facebook::react::JSIExecutor::~JSIExecutor (JSIExecutor.h:71)
51  WordPress                       0x201e29494         [inlined] std::__1::__function::__value_func<T>::operator() (functional:1885)
52  WordPress                       0x201e29494         [inlined] std::__1::function<T>::operator() (functional:2560)
53  WordPress                       0x201e29494         facebook::react::tryAndReturnError (RCTCxxUtils.mm:74)
54  WordPress                       0x201e35404         facebook::react::RCTMessageThread::tryFunc (RCTMessageThread.mm:69)
55  WordPress                       0x201e35748         facebook::react::RCTMessageThread::runOnQueueSync (RCTMessageThread.mm:92)
56  WordPress                       0x2021752d0         facebook::react::NativeToJsBridge::destroy (NativeToJsBridge.cpp:285)
57  WordPress                       0x20216b3ec         facebook::react::Instance::~Instance (Instance.cpp:39)
58  WordPress                       0x201e2698c         [inlined] std::__1::default_delete<T>::operator() (memory:1428)
59  WordPress                       0x201e2698c         std::__1::__shared_ptr_pointer<T>::__on_zero_shared (memory:2596)
60  WordPress                       0x201e2350c         [inlined] std::__1::__shared_count::__release_shared (memory:2506)
61  WordPress                       0x201e2350c         [inlined] std::__1::__shared_weak_count::__release_shared (memory:2548)
62  WordPress                       0x201e2350c         [inlined] std::__1::shared_ptr<T>::~shared_ptr (memory:3238)
63  WordPress                       0x201e2350c         [inlined] std::__1::shared_ptr<T>::~shared_ptr (memory:3236)
64  WordPress                       0x201e2350c         [inlined] std::__1::shared_ptr<T>::reset (memory:3333)
65  WordPress                       0x201e2350c         __26-[RCTCxxBridge invalidate]_block_invoke (RCTCxxBridge.mm:1333)
66  WordPress                       0x201e29494         [inlined] std::__1::__function::__value_func<T>::operator() (functional:1885)
67  WordPress                       0x201e29494         [inlined] std::__1::function<T>::operator() (functional:2560)
68  WordPress                       0x201e29494         facebook::react::tryAndReturnError (RCTCxxUtils.mm:74)
69  WordPress                       0x201e1e65c         -[RCTCxxBridge _tryAndHandleError:] (RCTCxxBridge.mm:376)
70  Foundation                      0x34a3e9f1c         __NSThreadPerformPerform
71  CoreFoundation                  0x34747f410         __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__
72  CoreFoundation                  0x34749019c         __CFRunLoopDoSource0
73  CoreFoundation                  0x3473c9690         __CFRunLoopDoSources0
74  CoreFoundation                  0x3473cf058         __CFRunLoopRun
75  CoreFoundation                  0x3473e2bc4         CFRunLoopRunSpecific
76  WordPress                       0x201e1e590         +[RCTCxxBridge runRunLoop] (RCTCxxBridge.mm:367)
77  Foundation                      0x34a415438         __NSThread__start__
78  libsystem_pthread.dylib         0x42977b9a8         _pthread_start

The next one is a bit different and in fact, it doesn't look like that is happening upon editor closing. However, per the last user events, it occurred some seconds after closing the editor.

Click here to display the stack trace

0   WordPress                       0x2019f48fc         std::__1::__hash_table<T>::find<T> (__hash_table:2394)
1   WordPress                       0x201a1e8d4         reanimated::ShareableValue::adapt (ShareableValue.cpp:194)
2   WordPress                       0x2019ecfbc         reanimated::FrozenObject::FrozenObject (FrozenObject.cpp:19)
3   WordPress                       0x201a20eb0         [inlined] std::__1::make_unique<T> (memory:2099)
4   WordPress                       0x201a20eb0         reanimated::RemoteObject::RemoteObject (RemoteObject.h:28)
5   WordPress                       0x201a1d9d0         [inlined] reanimated::RemoteObject::RemoteObject (RemoteObject.h:28)
6   WordPress                       0x201a1d9d0         [inlined] std::__1::__shared_ptr_emplace<T>::__shared_ptr_emplace<T> (memory:2627)
7   WordPress                       0x201a1d9d0         [inlined] std::__1::__shared_ptr_emplace<T>::__shared_ptr_emplace<T> (memory:2621)
8   WordPress                       0x201a1d9d0         [inlined] std::__1::allocate_shared<T> (memory:3385)
9   WordPress                       0x201a1d9d0         [inlined] std::__1::make_shared<T> (memory:3394)
10  WordPress                       0x201a1d9d0         reanimated::ShareableValue::adapt (ShareableValue.cpp:158)
11  WordPress                       0x201a1e8d4         reanimated::ShareableValue::adapt (ShareableValue.cpp:194)
12  WordPress                       0x2019fbcb4         reanimated::NativeReanimatedModule::makeRemote (NativeReanimatedModule.cpp:119)
13  WordPress                       0x201ddf394         [inlined] std::__1::__function::__value_func<T>::operator() (functional:1885)
14  WordPress                       0x201ddf394         std::__1::function<T>::operator() (functional:2560)
15  WordPress                       0x201ddf0dc         facebook::jsc::JSCRuntime::createFunctionFromHostFunction::HostFunctionMetadata::call (JSCRuntime.cpp:1158)
16  JavaScriptCore                  0x33304dc74         JSC::JSCallbackObject<T>::callImpl
17  JavaScriptCore                  0x3336b3b88         JSC::LLInt::setUpCall
18  JavaScriptCore                  0x332fc32b8         llint_entry
19  JavaScriptCore                  0x332fc3224         [inlined] llint_entry
20  JavaScriptCore                  0x332fc3224         [inlined] llint_entry
21  JavaScriptCore                  0x332fc3224         llint_entry
22  JavaScriptCore                  0x332fc32cc         llint_entry
23  JavaScriptCore                  0x332fc3224         [inlined] llint_entry
24  JavaScriptCore                  0x332fc3224         [inlined] llint_entry
25  JavaScriptCore                  0x332fc3224         [inlined] llint_entry
26  JavaScriptCore                  0x332fc3224         [inlined] llint_entry
27  JavaScriptCore                  0x332fc3224         llint_entry
28  JavaScriptCore                  0x332fa1104         vmEntryToJavaScript
29  JavaScriptCore                  0x3335ce92c         JSC::Interpreter::executeCall
30  JavaScriptCore                  0x3338793ec         JSC::boundThisNoArgsFunctionCall
31  JavaScriptCore                  0x332fc5bac         llint_entry
32  JavaScriptCore                  0x332fc32cc         llint_entry
33  JavaScriptCore                  0x332fc3224         [inlined] llint_entry
34  JavaScriptCore                  0x332fc3224         llint_entry
35  JavaScriptCore                  0x332fa1104         vmEntryToJavaScript
36  JavaScriptCore                  0x3335ce92c         JSC::Interpreter::executeCall
37  JavaScriptCore                  0x3338793ec         JSC::boundThisNoArgsFunctionCall
38  JavaScriptCore                  0x332fc5bac         llint_entry
39  JavaScriptCore                  0x332fc32cc         [inlined] llint_entry
40  JavaScriptCore                  0x332fc32cc         [inlined] llint_entry
41  JavaScriptCore                  0x332fc32cc         [inlined] llint_entry
42  JavaScriptCore                  0x332fc32cc         [inlined] llint_entry
43  JavaScriptCore                  0x332fc32cc         [inlined] llint_entry
44  JavaScriptCore                  0x332fc32cc         llint_entry
45  JavaScriptCore                  0x332fc3224         [inlined] llint_entry
46  JavaScriptCore                  0x332fc3224         [inlined] llint_entry
47  JavaScriptCore                  0x332fc3224         [inlined] llint_entry
48  JavaScriptCore                  0x332fc3224         llint_entry
49  JavaScriptCore                  0x332fc32cc         [inlined] llint_entry
50  JavaScriptCore                  0x332fc32cc         [inlined] llint_entry
51  JavaScriptCore                  0x332fc32cc         [inlined] llint_entry
52  JavaScriptCore                  0x332fc32cc         [inlined] llint_entry
53  JavaScriptCore                  0x332fc32cc         [inlined] llint_entry
54  JavaScriptCore                  0x332fc32cc         llint_entry
55  JavaScriptCore                  0x332fc3224         llint_entry
56  JavaScriptCore                  0x332fc32cc         llint_entry
57  JavaScriptCore                  0x332fc3224         [inlined] llint_entry
58  JavaScriptCore                  0x332fc3224         [inlined] llint_entry
59  JavaScriptCore                  0x332fc3224         [inlined] llint_entry
60  JavaScriptCore                  0x332fc3224         llint_entry
61  JavaScriptCore                  0x332fc32cc         [inlined] llint_entry
62  JavaScriptCore                  0x332fc32cc         llint_entry
63  JavaScriptCore                  0x332fc3224         [inlined] llint_entry
64  JavaScriptCore                  0x332fc3224         [inlined] llint_entry
65  JavaScriptCore                  0x332fc3224         [inlined] llint_entry
66  JavaScriptCore                  0x332fc3224         llint_entry
67  JavaScriptCore                  0x332fc32cc         llint_entry
68  JavaScriptCore                  0x332fc4820         llint_entry
69  JavaScriptCore                  0x332fc32cc         [inlined] llint_entry
70  JavaScriptCore                  0x332fc32cc         llint_entry
71  JavaScriptCore                  0x332fc4820         [inlined] llint_entry
72  JavaScriptCore                  0x332fc4820         llint_entry
73  JavaScriptCore                  0x332fc3224         llint_entry
74  JavaScriptCore                  0x332fc32cc         llint_entry
75  JavaScriptCore                  0x332fc3224         llint_entry
76  JavaScriptCore                  0x332fa1104         vmEntryToJavaScript
77  JavaScriptCore                  0x3335ce92c         JSC::Interpreter::executeCall
78  JavaScriptCore                  0x3338793ec         JSC::boundThisNoArgsFunctionCall
79  JavaScriptCore                  0x332fa12b4         vmEntryToNative
80  JavaScriptCore                  0x3335ce95c         JSC::Interpreter::executeCall
81  JavaScriptCore                  0x3337d4768         JSC::profiledCall
82  JavaScriptCore                  0x33305acd8         JSObjectCallAsFunction
83  WordPress                       0x201ddd584         facebook::jsc::JSCRuntime::call (JSCRuntime.cpp:1260)
84  WordPress                       0x201de91b0         [inlined] facebook::jsi::Function::call (jsi-inl.h:228)
85  WordPress                       0x201de91b0         [inlined] facebook::jsi::Function::call (jsi-inl.h:233)
86  WordPress                       0x201de91b0         facebook::jsi::Function::call<T> (jsi-inl.h:241)
87  WordPress                       0x201de9014         [inlined] facebook::react::JSIExecutor::callFunction::lambda::operator() (JSIExecutor.cpp:256)
88  WordPress                       0x201de9014         [inlined] std::__1::__invoke<T> (type_traits:3694)
89  WordPress                       0x201de9014         [inlined] std::__1::__invoke_void_return_wrapper<T>::__call<T> (__functional_base:348)
90  WordPress                       0x201de9014         [inlined] std::__1::__function::__alloc_func<T>::operator() (functional:1558)
91  WordPress                       0x201de9014         std::__1::__function::__func<T>::operator() (functional:1732)
92  WordPress                       0x201a5bd4c         [inlined] std::__1::__invoke<T> (type_traits:3694)
93  WordPress                       0x201a5bd4c         std::__1::__invoke_void_return_wrapper<T>::__call<T> (__functional_base:348)
94  WordPress                       0x201de6430         [inlined] std::__1::__function::__value_func<T>::operator() (functional:1885)
95  WordPress                       0x201de6430         [inlined] std::__1::function<T>::operator() (functional:2560)
96  WordPress                       0x201de6430         facebook::react::JSIExecutor::callFunction (JSIExecutor.cpp:254)
97  WordPress                       0x201dc43b8         [inlined] std::__1::__function::__value_func<T>::operator() (functional:1885)
98  WordPress                       0x201dc43b8         [inlined] std::__1::function<T>::operator() (functional:2560)
99  WordPress                       0x201dc43b8         [inlined] facebook::react::NativeToJsBridge::runOnExecutorQueue::lambda::operator() (NativeToJsBridge.cpp:310)
100 WordPress                       0x201dc43b8         [inlined] std::__1::__invoke<T> (type_traits:3694)
101 WordPress                       0x201dc43b8         [inlined] std::__1::__invoke_void_return_wrapper<T>::__call<T> (__functional_base:348)
102 WordPress                       0x201dc43b8         [inlined] std::__1::__function::__alloc_func<T>::operator() (functional:1558)
103 WordPress                       0x201dc43b8         std::__1::__function::__func<T>::operator() (functional:1732)
104 WordPress                       0x201a7ab60         [inlined] std::__1::__function::__value_func<T>::operator() (functional:1885)
105 WordPress                       0x201a7ab60         [inlined] std::__1::function<T>::operator() (functional:2560)
106 WordPress                       0x201a7ab60         facebook::react::tryAndReturnError (RCTCxxUtils.mm:74)
107 WordPress                       0x201a86ad0         facebook::react::RCTMessageThread::tryFunc (RCTMessageThread.mm:69)
108 WordPress                       0x201a86884         [inlined] std::__1::__function::__value_func<T>::operator() (functional:1885)
109 WordPress                       0x201a86884         [inlined] std::__1::function<T>::operator() (functional:2560)
110 WordPress                       0x201a86884         facebook::react::RCTMessageThread::runAsync (RCTMessageThread.mm:45)
111 CoreFoundation                  0x32132264c         __CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK__
112 CoreFoundation                  0x3213218e0         __CFRunLoopDoBlocks
113 CoreFoundation                  0x32131c420         __CFRunLoopRun
114 CoreFoundation                  0x32131b814         CFRunLoopRunSpecific
115 WordPress                       0x201a6fc5c         +[RCTCxxBridge runRunLoop] (RCTCxxBridge.mm:367)
116 Foundation                      0x3239bcdac         __NSThread__start__
117 libsystem_pthread.dylib         0x3b05c1c70         _pthread_start

Additionally, If found other stack traces, less frequent, but also related to closing the editor:

Click here to display the stack trace

0   WordPress                       0x20361b4b4         [inlined] std::__1::__function::__value_func<T>::__value_func (functional:1820)
1   WordPress                       0x20361b4b4         [inlined] std::__1::__function::__value_func<T>::__value_func (functional:1811)
2   WordPress                       0x20361b4b4         std::__1::function<T>::function (functional:2480)
3   WordPress                       0x2038cf2dc         [inlined] std::__1::function<T>::function (functional:2480)
4   WordPress                       0x2038cf2dc         reanimated::Queue<T>::pop (Scheduler.h:27)
5   WordPress                       0x2038cf134         reanimated::Scheduler::triggerUI (Scheduler.cpp:16)
6   libdispatch.dylib               0x36507fe68         _dispatch_call_block_and_release
7   libdispatch.dylib               0x365081a2c         _dispatch_client_callout
8   libdispatch.dylib               0x36508ff44         _dispatch_main_queue_drain
9   libdispatch.dylib               0x36508fb94         _dispatch_main_queue_callback_4CF
10  CoreFoundation                  0x3656d57fc         __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__
11  CoreFoundation                  0x36568f700         __CFRunLoopRun
12  CoreFoundation                  0x3656a2bc4         CFRunLoopRunSpecific
13  GraphicsServices                0x39d927370         GSEventRunModal
14  UIKitCore                       0x36a48c644         -[UIApplication _run]
15  UIKitCore                       0x36a20dd8c         UIApplicationMain
16  WordPress                       0x202aae7fc         main (main.swift:7)
17  <unknown>                       0x104ac1ce4         <redacted>

Click here to display the stack trace

0   WordPress                       0x200fd0f98         [inlined] std::__1::shared_ptr<T>::get (memory:2863)
1   WordPress                       0x200fd0f98         [inlined] reanimated::MutableValue::set::lambda::operator() (MutableValue.cpp:68)
2   WordPress                       0x200fd0f98         [inlined] std::__1::__invoke<T> (type_traits:3694)
3   WordPress                       0x200fd0f98         [inlined] std::__1::__invoke_void_return_wrapper<T>::__call<T> (__functional_base:348)
4   WordPress                       0x200fd0f98         [inlined] std::__1::__function::__alloc_func<T>::operator() (functional:1558)
5   WordPress                       0x200fd0f98         std::__1::__function::__func<T>::operator() (functional:1732)
6   WordPress                       0x200ff7148         [inlined] std::__1::__function::__value_func<T>::operator() (functional:1885)
7   WordPress                       0x200ff7148         [inlined] std::__1::function<T>::operator() (functional:2560)
8   WordPress                       0x200ff7148         reanimated::Scheduler::triggerUI (Scheduler.cpp:17)
9   libdispatch.dylib               0x339c7be68         _dispatch_call_block_and_release
10  libdispatch.dylib               0x339c7da2c         _dispatch_client_callout
11  libdispatch.dylib               0x339c8bf44         _dispatch_main_queue_drain
12  libdispatch.dylib               0x339c8bb94         _dispatch_main_queue_callback_4CF
13  CoreFoundation                  0x33a2d17fc         __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__
14  CoreFoundation                  0x33a28b700         __CFRunLoopRun
15  CoreFoundation                  0x33a29ebc4         CFRunLoopRunSpecific
16  GraphicsServices                0x372523370         GSEventRunModal
17  UIKitCore                       0x33f088644         -[UIApplication _run]
18  UIKitCore                       0x33ee09d8c         UIApplicationMain
19  WordPress                       0x2001d67fc         main (main.swift:7)
20  <unknown>                       0x101ff5ce4         <redacted>

JSCRuntime destroyed with a dangling API object

• Sentry event: https://sentry.io/share/issue/008525576b7b43149eb63e9c917c4426/
• Affected app versions: 19.9.1.0 and newer
• Stacktrace insights: Looks like it's tied to React Native environment destruction, specifically the JSI executor and Reanimated's NativeReanimatedModule.
• User action insights: The last user action is closeWasPressedWithSender, so the crash happened upon closing the editor, similar to the other crashes.
• Potential workaround 🔧 : There's a PR with a fix in the Reanimated repository, quite related to this crash, so probably that solution could be applied for this case. The only caveat is that it was only applied to Android, but since the files updated are in the C++ side, I think it would be feasible to do the same for iOS.

Stacktrace

Click here to display the stack trace

0   libsystem_kernel.dylib          0x302108ebc         __pthread_kill
1   libsystem_pthread.dylib         0x301f66c18         pthread_kill$VARIANT$armv81
2   libsystem_c.dylib               0x301d99820         abort
3   libsystem_c.dylib               0x301d98c40         __assert_rtn
4   WordPress                       0x2013257b0         facebook::jsc::JSCRuntime::~JSCRuntime (JSCRuntime.cpp:393)
5   WordPress                       0x201325858         [inlined] facebook::jsc::JSCRuntime::~JSCRuntime (JSCRuntime.cpp:383)
6   WordPress                       0x201325858         facebook::jsc::JSCRuntime::~JSCRuntime (JSCRuntime.cpp:383)
7   WordPress                       0x200d07fdc         [inlined] std::__1::__shared_count::__release_shared (memory:2506)
8   WordPress                       0x200d07fdc         [inlined] std::__1::__shared_weak_count::__release_shared (memory:2548)
9   WordPress                       0x200d07fdc         std::__1::shared_ptr<T>::~shared_ptr (memory:3238)
10  WordPress                       0x200f42358         [inlined] std::__1::shared_ptr<T>::~shared_ptr (memory:3236)
11  WordPress                       0x200f42358         reanimated::RuntimeManager::~RuntimeManager (RuntimeManager.h:36)
12  WordPress                       0x200f4432c         reanimated::NativeReanimatedModule::~NativeReanimatedModule (NativeReanimatedModule.h:25)
13  WordPress                       0x200d07fdc         [inlined] std::__1::__shared_count::__release_shared (memory:2506)
14  WordPress                       0x200d07fdc         [inlined] std::__1::__shared_weak_count::__release_shared (memory:2548)
15  WordPress                       0x200d07fdc         std::__1::shared_ptr<T>::~shared_ptr (memory:3238)
16  WordPress                       0x201328150         [inlined] std::__1::shared_ptr<T>::~shared_ptr (memory:3236)
17  WordPress                       0x201328150         [inlined] facebook::jsc::detail::HostObjectProxyBase::~HostObjectProxyBase (JSCRuntime.cpp:695)
18  WordPress                       0x201328150         [inlined] facebook::jsc::JSCRuntime::createObject::HostObjectProxy::~HostObjectProxy (JSCRuntime.cpp:712)
19  WordPress                       0x201328150         [inlined] facebook::jsc::JSCRuntime::createObject::HostObjectProxy::~HostObjectProxy (JSCRuntime.cpp:712)
20  WordPress                       0x201328150         facebook::jsc::JSCRuntime::createObject::HostObjectProxy::finalize (JSCRuntime.cpp:817)
21  JavaScriptCore                  0x31fe3ea60         JSC::JSCallbackObject<T>::destroy
22  JavaScriptCore                  0x3205d95e0         JSC::MarkedBlock::Handle::specializedSweep<T>
23  JavaScriptCore                  0x3205d6e74         JSC::MarkedBlock::Handle::finishSweepKnowingHeapCellType<T>
24  JavaScriptCore                  0x3205d6d20         JSC::JSDestructibleObjectHeapCellType::finishSweep
25  JavaScriptCore                  0x3202b214c         JSC::MarkedBlock::Handle::sweep
26  JavaScriptCore                  0x32028ddf0         JSC::BlockDirectory::lastChanceToFinalize
27  JavaScriptCore                  0x3202b3b5c         JSC::MarkedSpace::lastChanceToFinalize
28  JavaScriptCore                  0x320293758         JSC::Heap::lastChanceToFinalize
29  JavaScriptCore                  0x320702678         JSC::VM::~VM
30  JavaScriptCore                  0x320607a8c         JSC::JSLockHolder::~JSLockHolder
31  JavaScriptCore                  0x31fe4ce60         JSGlobalContextRelease
32  WordPress                       0x201325758         facebook::jsc::JSCRuntime::~JSCRuntime (JSCRuntime.cpp:391)
33  WordPress                       0x201325858         [inlined] facebook::jsc::JSCRuntime::~JSCRuntime (JSCRuntime.cpp:383)
34  WordPress                       0x201325858         facebook::jsc::JSCRuntime::~JSCRuntime (JSCRuntime.cpp:383)
35  WordPress                       0x200d07fdc         [inlined] std::__1::__shared_count::__release_shared (memory:2506)
36  WordPress                       0x200d07fdc         [inlined] std::__1::__shared_weak_count::__release_shared (memory:2548)
37  WordPress                       0x200d07fdc         std::__1::shared_ptr<T>::~shared_ptr (memory:3238)
38  WordPress                       0x201332b38         [inlined] std::__1::shared_ptr<T>::~shared_ptr (memory:3236)
39  WordPress                       0x201332b38         facebook::react::JSIExecutor::~JSIExecutor (JSIExecutor.h:71)
40  WordPress                       0x201332a24         [inlined] facebook::react::JSIExecutor::~JSIExecutor (JSIExecutor.h:71)
41  WordPress                       0x201332a24         facebook::react::JSIExecutor::~JSIExecutor (JSIExecutor.h:71)
42  WordPress                       0x200fc1494         [inlined] std::__1::__function::__value_func<T>::operator() (functional:1885)
43  WordPress                       0x200fc1494         [inlined] std::__1::function<T>::operator() (functional:2560)
44  WordPress                       0x200fc1494         facebook::react::tryAndReturnError (RCTCxxUtils.mm:74)
45  WordPress                       0x200fcd404         facebook::react::RCTMessageThread::tryFunc (RCTMessageThread.mm:69)
46  WordPress                       0x200fcd748         facebook::react::RCTMessageThread::runOnQueueSync (RCTMessageThread.mm:92)
47  WordPress                       0x20130d2d0         facebook::react::NativeToJsBridge::destroy (NativeToJsBridge.cpp:285)
48  WordPress                       0x2013033ec         facebook::react::Instance::~Instance (Instance.cpp:39)
49  WordPress                       0x200fbe98c         [inlined] std::__1::default_delete<T>::operator() (memory:1428)
50  WordPress                       0x200fbe98c         std::__1::__shared_ptr_pointer<T>::__on_zero_shared (memory:2596)
51  WordPress                       0x200fbb50c         [inlined] std::__1::__shared_count::__release_shared (memory:2506)
52  WordPress                       0x200fbb50c         [inlined] std::__1::__shared_weak_count::__release_shared (memory:2548)
53  WordPress                       0x200fbb50c         [inlined] std::__1::shared_ptr<T>::~shared_ptr (memory:3238)
54  WordPress                       0x200fbb50c         [inlined] std::__1::shared_ptr<T>::~shared_ptr (memory:3236)
55  WordPress                       0x200fbb50c         [inlined] std::__1::shared_ptr<T>::reset (memory:3333)
56  WordPress                       0x200fbb50c         __26-[RCTCxxBridge invalidate]_block_invoke (RCTCxxBridge.mm:1333)
57  WordPress                       0x200fc1494         [inlined] std::__1::__function::__value_func<T>::operator() (functional:1885)
58  WordPress                       0x200fc1494         [inlined] std::__1::function<T>::operator() (functional:2560)
59  WordPress                       0x200fc1494         facebook::react::tryAndReturnError (RCTCxxUtils.mm:74)
60  WordPress                       0x200fb665c         -[RCTCxxBridge _tryAndHandleError:] (RCTCxxBridge.mm:376)
61  Foundation                      0x302bd6234         __NSThreadPerformPerform
62  CoreFoundation                  0x30238f7dc         __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__
63  CoreFoundation                  0x30238f734         __CFRunLoopDoSource0
64  CoreFoundation                  0x30238eecc         __CFRunLoopDoSources0
65  CoreFoundation                  0x30238a018         __CFRunLoopRun
66  CoreFoundation                  0x3023898b8         CFRunLoopRunSpecific
67  WordPress                       0x200fb6590         +[RCTCxxBridge runRunLoop] (RCTCxxBridge.mm:367)
68  Foundation                      0x302bd60ac         __NSThread__start__
69  libsystem_pthread.dylib         0x301f6b1e8         _pthread_start

C++ exception - PostPostViewController - NSt3__112system_errorE

• Sentry event: https://sentry.io/share/issue/008525576b7b43149eb63e9c917c4426/
• Affected app versions: 19.9.1.0 and newer
• Stacktrace insights: The stack doesn't provide enough information to identify the cause.
• User action insights: The latest user actions are publishButtonTappedWithSender followed with publish or closeWasPressedWithSender.

Stacktrace

Click here to display the stack trace

libsystem_kernel    0x1b85744fc  mach_msg_trap
  libsystem_kernel    0x1b8573880  mach_msg
  CoreFoundation      0x18a327e54  __CFRunLoopServiceMachPort
  CoreFoundation      0x18a321cf4  __CFRunLoopRun
  CoreFoundation      0x18a321304  CFRunLoopRunSpecific
  Foundation          0x18b610d88  -[NSRunLoop(NSRunLoop) runMode:beforeDate:]
  Foundation          0x18b610c54  -[NSRunLoop(NSRunLoop) runUntilDate:]
  UIKitCore           0x18ce54300  -[UIEventFetcher threadMain]
  Foundation          0x18b782308  __NSThread__start__
  libsystem_pthread   0x1d601cbf8  _pthread_start

C++ exception - UICompatibilityInputViewController - N8facebook3jsi7JSErrorE

• Sentry event: https://sentry.io/share/issue/c06d4b24434f416e97aa432d57e06056/
• Affected app versions: 19.9.1.0 and newer
• Stacktrace insights: The stack doesn't provide enough information to identify the cause.
• User action insights: Similar to the other crashes, the last user action is publishButtonTappedWithSender. However, in this case, there's no publish action, and even the publishButtonTappedWithSender action is not included in every Sentry event. This makes me think that the crash is also happening upon closing the editor, but maybe a bit earlier than the rest of the crashes 🤔 .

Stacktrace

Click here to display the stack trace

  libsystem_kernel    0x1b5c904fc  mach_msg_trap
  libsystem_kernel    0x1b5c8f880  mach_msg
  CoreFoundation      0x187b17eac  __CFRunLoopServiceMachPort
  CoreFoundation      0x187b11d4c  __CFRunLoopRun
  CoreFoundation      0x187b1135c  CFRunLoopRunSpecific
  Foundation          0x188dfefd8  -[NSRunLoop(NSRunLoop) runMode:beforeDate:]
  Foundation          0x188dfeea4  -[NSRunLoop(NSRunLoop) runUntilDate:]
  UIKitCore           0x18a641128  -[UIEventFetcher threadMain]
  Foundation          0x188f70328  __NSThread__start__
  libsystem_pthread   0x1d3700bf8  _pthread_start

Don't try to clone an object backed by a different Runtime

• Sentry event: https://sentry.io/share/issue/5070bdca207a4c4c93af5e2123e5653c/
• Affected app version: 19.5.0.4 and newer
• Stacktrace insights: The error message states that it's trying to clone an object backed by a different runtime. This error is a bit odd as we're not using different runtimes, so no clue here about the culprit.
• User action insights: Looks like it's happening upon opening the editor per the last user actions.
• Potential workaround: I found a GitHub comment that outlines a similar stack trace, it states that upgrading to Reanimated 2.6.0 might solve the issue. Another possible culprit might be our version of the React Navigation library, which uses Reanimated and might produce a conflict between using v1 and v2 of Reanimated.

Stacktrace

Click here to display the stack trace

0   libsystem_kernel.dylib          0x39d0e5b38         __pthread_kill
1   libsystem_pthread.dylib         0x410b453b8         pthread_kill
2   libsystem_c.dylib               0x343bae520         abort
3   libsystem_c.dylib               0x343c05994         __assert_rtn
4   WordPress                       0x2015f92fc         facebook::jsc::JSCRuntime::cloneObject (JSCRuntime.cpp:616)
5   WordPress                       0x2015b7fd8         facebook::jsc::JSCRuntime::cloneObject (JSCRuntime.cpp:616)
6   WordPress                       0x2011feae4         [inlined] facebook::jsi::Value::Value (jsi.h:995)
7   WordPress                       0x2011feae4         [inlined] facebook::jsi::detail::toValue<T> (jsi-inl.h:40)
8   WordPress                       0x2011feae4         facebook::jsi::Object::setProperty<T> (jsi-inl.h:117)
9   WordPress                       0x2011fe3f8         [inlined] reanimated::ShareableValue::toJSValue::lambda::operator() (ShareableValue.cpp:387)
10  WordPress                       0x2011fe3f8         [inlined] std::__1::__invoke<T> (type_traits:3694)
11  WordPress                       0x2011fe3f8         [inlined] std::__1::__invoke_void_return_wrapper<T>::__call<T> (__functional_base:317)
12  WordPress                       0x2011fe3f8         [inlined] std::__1::__function::__alloc_func<T>::operator() (functional:1558)
13  WordPress                       0x2011fe3f8         std::__1::__function::__func<T>::operator() (functional:1732)
14  WordPress                       0x2015bb394         [inlined] std::__1::__function::__value_func<T>::operator() (functional:1885)
15  WordPress                       0x2015bb394         std::__1::function<T>::operator() (functional:2560)
16  WordPress                       0x2015bb0dc         facebook::jsc::JSCRuntime::createFunctionFromHostFunction::HostFunctionMetadata::call (JSCRuntime.cpp:1158)
17  JavaScriptCore                  0x3441be024         JSC::callJSNonFinalObjectCallbackObject
18  JavaScriptCore                  0x3449ff4e8         JSC::handleHostCall
19  JavaScriptCore                  0x344a32ac0         llint_link_call
20  JavaScriptCore                  0x344141d38         llint_function_for_construct_arity_checkTagGateAfter
21  JavaScriptCore                  0x34413e4f4         [inlined] llint_function_for_construct_arity_checkTagGateAfter
22  JavaScriptCore                  0x34413e4f4         [inlined] llint_function_for_construct_arity_checkTagGateAfter
23  JavaScriptCore                  0x34413e4f4         [inlined] llint_function_for_construct_arity_checkTagGateAfter
24  JavaScriptCore                  0x34413e4f4         [inlined] llint_function_for_construct_arity_checkTagGateAfter
25  JavaScriptCore                  0x34413e4f4         [inlined] llint_function_for_construct_arity_checkTagGateAfter
26  JavaScriptCore                  0x34413e4f4         [inlined] llint_function_for_construct_arity_checkTagGateAfter
27  JavaScriptCore                  0x34413e4f4         [inlined] llint_function_for_construct_arity_checkTagGateAfter
28  JavaScriptCore                  0x34413e4f4         [inlined] llint_function_for_construct_arity_checkTagGateAfter
29  JavaScriptCore                  0x34413e4f4         [inlined] llint_function_for_construct_arity_checkTagGateAfter
30  JavaScriptCore                  0x34413e4f4         [inlined] llint_function_for_construct_arity_checkTagGateAfter
31  JavaScriptCore                  0x34413e4f4         [inlined] llint_function_for_construct_arity_checkTagGateAfter
32  JavaScriptCore                  0x34413e4f4         [inlined] llint_function_for_construct_arity_checkTagGateAfter
33  JavaScriptCore                  0x34413e4f4         [inlined] llint_function_for_construct_arity_checkTagGateAfter
34  JavaScriptCore                  0x34413e4f4         [inlined] llint_function_for_construct_arity_checkTagGateAfter
35  JavaScriptCore                  0x34413e4f4         [inlined] llint_function_for_construct_arity_checkTagGateAfter
36  JavaScriptCore                  0x34413e4f4         [inlined] llint_function_for_construct_arity_checkTagGateAfter
37  JavaScriptCore                  0x34413e4f4         [inlined] llint_function_for_construct_arity_checkTagGateAfter
38  JavaScriptCore                  0x34413e4f4         [inlined] llint_function_for_construct_arity_checkTagGateAfter
39  JavaScriptCore                  0x34413e4f4         [inlined] llint_function_for_construct_arity_checkTagGateAfter
40  JavaScriptCore                  0x34413e4f4         [inlined] llint_function_for_construct_arity_checkTagGateAfter
41  JavaScriptCore                  0x34413e4f4         llint_function_for_construct_arity_checkTagGateAfter
42  JavaScriptCore                  0x34413e734         llint_function_for_construct_arity_checkTagGateAfter
43  JavaScriptCore                  0x34411442c         vmEntryToJavaScriptTrampoline
44  JavaScriptCore                  0x34490c638         JSC::Interpreter::executeProgram
45  JavaScriptCore                  0x344bd3984         JSC::evaluate
46  JavaScriptCore                  0x3441b53ac         JSEvaluateScript
47  WordPress                       0x2015b7648         facebook::jsc::JSCRuntime::evaluateJavaScript (JSCRuntime.cpp:429)
48  WordPress                       0x2015c1af4         facebook::react::JSIExecutor::loadBundle (JSIExecutor.cpp:159)
49  WordPress                       0x20159f570         [inlined] facebook::react::NativeToJsBridge::loadBundle::lambda::operator() (NativeToJsBridge.cpp:146)
50  WordPress                       0x20159f570         [inlined] std::__1::__invoke<T> (type_traits:3694)
51  WordPress                       0x20159f570         [inlined] std::__1::__invoke_void_return_wrapper<T>::__call<T> (__functional_base:348)
52  WordPress                       0x20159f570         [inlined] std::__1::__function::__alloc_func<T>::operator() (functional:1558)
53  WordPress                       0x20159f570         std::__1::__function::__func<T>::operator() (functional:1732)
54  WordPress                       0x2015a03b8         [inlined] std::__1::__function::__value_func<T>::operator() (functional:1885)
55  WordPress                       0x2015a03b8         [inlined] std::__1::function<T>::operator() (functional:2560)
56  WordPress                       0x2015a03b8         [inlined] facebook::react::NativeToJsBridge::runOnExecutorQueue::lambda::operator() (NativeToJsBridge.cpp:310)
57  WordPress                       0x2015a03b8         [inlined] std::__1::__invoke<T> (type_traits:3694)
58  WordPress                       0x2015a03b8         [inlined] std::__1::__invoke_void_return_wrapper<T>::__call<T> (__functional_base:348)
59  WordPress                       0x2015a03b8         [inlined] std::__1::__function::__alloc_func<T>::operator() (functional:1558)
60  WordPress                       0x2015a03b8         std::__1::__function::__func<T>::operator() (functional:1732)
61  WordPress                       0x201256b60         [inlined] std::__1::__function::__value_func<T>::operator() (functional:1885)
62  WordPress                       0x201256b60         [inlined] std::__1::function<T>::operator() (functional:2560)
63  WordPress                       0x201256b60         facebook::react::tryAndReturnError (RCTCxxUtils.mm:74)
64  WordPress                       0x201262ad0         facebook::react::RCTMessageThread::tryFunc (RCTMessageThread.mm:69)
65  WordPress                       0x201262884         [inlined] std::__1::__function::__value_func<T>::operator() (functional:1885)
66  WordPress                       0x201262884         [inlined] std::__1::function<T>::operator() (functional:2560)
67  WordPress                       0x201262884         facebook::react::RCTMessageThread::runAsync (RCTMessageThread.mm:45)
68  CoreFoundation                  0x32d9025a0         __CFRUNLOOP_IS_CALLING_OUT_TO_A_BLOCK__
69  CoreFoundation                  0x32d9034fc         __CFRunLoopDoBlocks
70  CoreFoundation                  0x32d89b3d4         __CFRunLoopRun
71  CoreFoundation                  0x32d8aebc4         CFRunLoopRunSpecific
72  WordPress                       0x20124bc5c         +[RCTCxxBridge runRunLoop] (RCTCxxBridge.mm:367)
73  Foundation                      0x3308e1438         __NSThread__start__
74  libsystem_pthread.dylib         0x410b3f9a8         _pthread_start

[fluiddot]

In relation to the previous comment, my plan is to go ahead with the fix provided in this PR on both platforms, which hopefully could help to address the crashes 🤞.

[geriux]

In relation to the previous comment, my plan is to go ahead with the fix provided in this PR on both platforms, which hopefully could help to address the crashes 🤞.

That's a great idea, I think that by adding the weakModule reference might help with this 🤞

[fluiddot]

In relation to the #41686 (comment), my plan is to go ahead with software-mansion/react-native-reanimated#3185 on both platforms, which hopefully could help to address the crashes 🤞.

Looks like the C++ side of Reanimated differs by platform, so the fix that was already released for Android might require extra work and potentially won't provide a solution.

In fact, after applying the fix related to using a weak pointer, on iOS, we've managed to reproduce the crash JSCRuntime destroyed with a dangling API object consistently on development mode:

1. Open the WP-iOS app with the Metro server connected.
2. Open a post/page that already contains some blocks.
3. Long-press over a block to start dragging.
4. While dragging a block, close the editor using a different finger.
5. Observe that the app crashes throwing the following error and stack trace.

Interestingly enough, this issue can't be reproduced on production, although, per the stack trace and error message looks very similar to the ones that are listed in this issue's description.

@geriux and I have tried to track down the culprit, but couldn't manage to find a specific part that is causing the crash. Our gut feeling is that Reanimated is affected by some kind of race condition during the Reanimated native module deallocation, which ultimately produces an exception on random occasions. Looks like this type of crash is also encountered by other users of the library, here are some examples:

• [IOS] Random app crash on production build software-mansion/react-native-reanimated#2327 (comment)
• Inconsistent freezing on iOS software-mansion/react-native-reanimated#2244 (comment)

---

At this point, we could try upgrading the library to a newer version although we haven't found any specific entry in the new version changelogs for these issues. Alternatively, as mentioned in this comment, it might be worth trying to enable Hermes on iOS, in case it helps in addressing the issue.

[arinjay]

@fluiddot
were you able to reduce the crashes by enabling hermes on iOS?