I am saving the document
`let result = try database.defaultCollection().save(document: document, concurrencyControl: .failOnConflict)`
then got crash. I have no clue which cause this crash. Please help
>
> 0 libsystem_kernel.dylib 0x00000001e3040200 __pthread_kill + 8
> 1 libsystem_c.dylib 0x00000001ada75c8c abort + 180
> 2 libc++abi.dylib 0x00000001f33e2b8c __cxxabiv1::__aligned_malloc_with_fallback(unsigned long) + 0
> 3 libc++abi.dylib 0x00000001f33d2a68 demangling_terminate_handler() + 312
> 4 libobjc.A.dylib 0x000000019f775d4c _objc_terminate() + 160
> 5 CouchbaseLiteSwift 0x0000000104d7eb68 fleece::Backtrace::installTerminateHandler(std::__1::function<void (std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)>)::$_1::operator()() const::{lambda()#1}::operator()() const + 112 (Backtrace.cc:414)
> 6 CouchbaseLiteSwift 0x0000000104d7eaf8 fleece::Backtrace::installTerminateHandler(std::__1::function<void (std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)>)::$_1::operator()() const::{lambda()#1}::operator()() const + 0 (Backtrace.cc:400)
> 7 libc++abi.dylib 0x00000001f33e1f28 std::__terminate(void (*)()) + 20
> 8 libc++abi.dylib 0x00000001f33e1ec4 std::terminate() + 56
> 9 CouchbaseLiteSwift 0x0000000104c33a78 fleece::Retained<litecore::C4QueryEnumeratorImpl>::~Retained() + 0 (vendor/fleece/API/fleece/RefCounted.hh:109)
> 10 CouchbaseLiteSwift 0x0000000104c33a78 fleece::Retained<litecore::C4QueryEnumeratorImpl>::~Retained() + 0
> 11 CouchbaseLiteSwift 0x0000000104c33a78 C4Query::notifyObservers(std::__1::set<litecore::C4QueryObserverImpl*, std::__1::less<litecore::C4QueryObserverImpl*>, std::__1::allocator<litecore::C4QueryObserverImpl*> > const&, litecore::QueryEnumerator*, C4Error) + 124 (C/c4Query.cc:327)
> 12 CouchbaseLiteSwift 0x0000000104c33f78 C4Query::liveQuerierUpdated(litecore::QueryEnumerator*, C4Error) + 108 (C/c4Query.cc:309)
> 13 CouchbaseLiteSwift 0x0000000104c88414 fleece::Retained<litecore::QueryEnumerator>::~Retained() + 0 (vendor/fleece/API/fleece/RefCounted.hh:109)
> 14 CouchbaseLiteSwift 0x0000000104c88414 fleece::Retained<litecore::QueryEnumerator>::~Retained() + 0
> 15 CouchbaseLiteSwift 0x0000000104c88414 litecore::LiveQuerier::_runQuery(litecore::Query::Options) + 468 (LiteCore/Database/LiveQuerier.cc:209)
> 16 CouchbaseLiteSwift 0x0000000104c888ac invocation function for block in litecore::actor::Actor::enqueue<litecore::LiveQuerier, litecore::Query::Options>(char const*, void (litecore::LiveQuerier::*)(litecore::Query::Options), litecore::Query::Options) + 60
> 17 CouchbaseLiteSwift 0x0000000104c23e70 litecore::actor::GCDMailbox::safelyCall(void () block_pointer) const + 28 (LiteCore/Support/GCDMailbox.cc:94)
> 18 CouchbaseLiteSwift 0x0000000104c23f2c invocation function for block in litecore::actor::GCDMailbox::enqueue(char const*, void () block_pointer) + 16 (LiteCore/Support/GCDMailbox.cc:117)
> 19 libdispatch.dylib 0x00000001ada104b4 _dispatch_call_block_and_release + 32
> 20 libdispatch.dylib 0x00000001ada11fdc _dispatch_client_callout + 20
> 21 libdispatch.dylib 0x00000001ada19694 _dispatch_lane_serial_drain + 672
> 22 libdispatch.dylib 0x00000001ada1a1e0 _dispatch_lane_invoke + 384
I don’t either.
If you were, for instance, to include the version of Couchbase Lite you were using, what platform you were running on, and some logs of what lead to the error, though, I might be able to figure it out.
The crash happened in Live Query. I suspected that the crash was caused by the live query was trying to post notification to the already-deleted query’s observer. However, it’s a bit weird that it crashed in the RefCounted’s release() function.
Do you happen to remove query’s change listener nor release Query object at the same time when saving a document? It would be very helpful if you have the steps to repro this or CBL verbose logs.
Hi @pasin
I’m too getting following same issue on my iOS app. Using couchbase latest version i.e., 3.1.6
> 5 CouchbaseLiteSwift 0x0000000104d7eb68 fleece::Backtrace::installTerminateHandler(std::__1::function<void (std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)>)::$_1::operator()() const::{lambda()#1}::operator()() const + 112 (Backtrace.cc:414)
> 6 CouchbaseLiteSwift 0x0000000104d7eaf8 fleece::Backtrace::installTerminateHandler(std::__1::function<void (std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)>)::$_1::operator()() const::{lambda()#1}::operator()() const + 0 (Backtrace.cc:400)
Could you please help in this.
@dotri84 are you able to resolve this issue?
@Techie_iOS It’s not possible to know with only that stacktrace what the issue you are having now. Can you provide the crash log with full stacktrace? Basically, we need more info.
BTW, we have identified and fixed a LiveQuery issue that could cause a crash when removing the token and notifying change happen at the same time. The fix is in release/3.1 brach in couchbase-lite-ios Github repo. We will release the fix in 3.1.7 release which may be out in a month or so (but timeline may be changed due to priority).