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Type:
Bug
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Resolution: Fixed
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Priority:
Major - P3
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None
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Affects Version/s: None
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Component/s: None
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?
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8294
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Not Needed
How frequently does the bug occur?
Always
Description
When using ObservedSectionedResults in SwiftUI, if you delete an item within a section, the app will crash with an index out of bounds error.
Stacktrace & log output
Unable to find source-code formatter for language: shell. Available languages are: actionscript, ada, applescript, bash, c, c#, c++, cpp, css, erlang, go, groovy, haskell, html, java, javascript, js, json, lua, none, nyan, objc, perl, php, python, r, rainbow, ruby, scala, sh, sql, swift, visualbasic, xml, yaml
2023-07-07 16:59:30.123938-0500 realm-bug-example[6128:92124] *** Terminating app due to uncaught exception 'RLMException', reason: 'Index 2 is out of bounds (must be less than 2).' *** First throw call stack: ( 0 CoreFoundation 0x0000000180437330 __exceptionPreprocess + 172 1 libobjc.A.dylib 0x0000000180051274 objc_exception_throw + 56 2 realm-bug-example 0x0000000104677318 _Z27RLMThrowCollectionExceptionP8NSString + 248 3 realm-bug-example 0x0000000104696d20 _ZL24translateCollectionErrorIZ28-[RLMSection objectAtIndex:]E3$_5EDaOT_P8NSString + 120 4 realm-bug-example 0x0000000104690d60 -[RLMSection objectAtIndex:] + 136 5 realm-bug-example 0x0000000104690ccc -[RLMSection objectAtIndexedSubscript:] + 40 6 realm-bug-example 0x00000001047daa3c $s10RealmSwift14ResultsSectionVyq_Sicig + 272 7 realm-bug-example 0x00000001047dc428 $s10RealmSwift14ResultsSectionVyq_Sicir + 156 8 realm-bug-example 0x00000001047dc310 $s10RealmSwift14ResultsSectionVyxq_GSlAASly7ElementQz5IndexQzcirTW + 92 9 SwiftUI 0x000000010d0e0450 OUTLINED_FUNCTION_61 + 944 10 SwiftUI 0x000000010d0e8494 OUTLINED_FUNCTION_61 + 33780 11 SwiftUI 0x000000010d0e8c80 OUTLINED_FUNCTION_61 + 35808 12 SwiftUI 0x000000010d0e8be8 OUTLINED_FUNCTION_61 + 35656 13 SwiftUI 0x000000010d1cf064 OUTLINED_FUNCTION_34 + 21608 14 SwiftUI 0x000000010cff5418 OUTLINED_FUNCTION_9 + 7060 15 SwiftUI 0x000000010cff5888 OUTLINED_FUNCTION_9 + 8196 16 SwiftUI 0x000000010d265f50 OUTLINED_FUNCTION_3 + 20752 17 SwiftUI 0x000000010d266120 OUTLINED_FUNCTION_3 + 21216 18 SwiftUI 0x000000010d266040 OUTLINED_FUNCTION_3 + 20992 19 SwiftUI 0x000000010c7506fc OUTLINED_FUNCTION_1 + 5468 20 SwiftUI 0x000000010c75095c OUTLINED_FUNCTION_1 + 6076 21 SwiftUI 0x000000010c7508a4 OUTLINED_FUNCTION_1 + 5892 22 libswiftCore.dylib 0x000000018bd0d7f0 $ss16IndexingIteratorVyxGStsSt4next7ElementQzSgyFTW + 356 23 libswiftCore.dylib 0x000000018be02250 $sSTsE21_copySequenceContents12initializing8IteratorQz_SitSry7ElementQzG_tF + 368 24 libswiftCore.dylib 0x000000018bcca4a8 $ss32_copyCollectionToContiguousArrayys0dE0Vy7ElementQzGxSlRzlF + 516 25 libswiftCore.dylib 0x000000018bcbacd4 $sSTsE22_copyToContiguousArrays0cD0Vy7ElementQzGyFTm + 40 26 libswiftCore.dylib 0x000000018bcbfd8c $ss15ContiguousArrayVyAByxGqd__c7ElementQyd__RszSTRd__lufC + 32 27 SwiftUI 0x000000010c750098 OUTLINED_FUNCTION_1 + 3832 28 SwiftUI 0x000000010c916680 OUTLINED_FUNCTION_35 + 4584 29 SwiftUI 0x000000010c91602c OUTLINED_FUNCTION_35 + 2964 30 SwiftUI 0x000000010c915594 OUTLINED_FUNCTION_35 + 252 31 SwiftUI 0x000000010d1e13c4 OUTLINED_FUNCTION_2 + 33020 32 SwiftUI 0x000000010d1ddc6c OUTLINED_FUNCTION_2 + 18852 33 SwiftUI 0x000000010d1da604 OUTLINED_FUNCTION_2 + 4924 34 SwiftUI 0x000000010d1d9d04 OUTLINED_FUNCTION_2 + 2620 35 SwiftUI 0x000000010cddfa58 OUTLINED_FUNCTION_11 + 27760 36 SwiftUI 0x000000010d32a178 OUTLINED_FUNCTION_26 + 616 37 SwiftUI 0x000000010c6da518 OUTLINED_FUNCTION_80 + 30888 38 SwiftUI 0x000000010c62ba00 OUTLINED_FUNCTION_5 + 26808 39 AttributeGraph 0x000000019d23fe34 _ZN2AG5Graph11UpdateStack6updateEv + 512 40 AttributeGraph 0x000000019d240534 _ZN2AG5Graph16update_attributeENS_4data3ptrINS_4NodeEEEj + 428 41 AttributeGraph 0x000000019d24d7a4 _ZN2AG8Subgraph6updateEj + 844 42 SwiftUI 0x000000010d304c40 OUTLINED_FUNCTION_37 + 1896 43 SwiftUI 0x000000010d307090 OUTLINED_FUNCTION_37 + 11192 44 SwiftUI 0x000000010ca00cf0 OUTLINED_FUNCTION_0 + 1716 45 SwiftUI 0x000000010d17f88c OUTLINED_FUNCTION_58 + 28272 46 SwiftUI 0x000000010d179c54 OUTLINED_FUNCTION_58 + 4664 47 SwiftUI 0x000000010ca00bcc OUTLINED_FUNCTION_0 + 1424 48 SwiftUI 0x000000010d30705c OUTLINED_FUNCTION_37 + 11140 49 SwiftUI 0x000000010d306f94 OUTLINED_FUNCTION_37 + 10940 50 SwiftUI 0x000000010ccc4e3c OUTLINED_FUNCTION_16 + 4404 51 SwiftUI 0x000000010c754110 OUTLINED_FUNCTION_1 + 20336 52 SwiftUI 0x000000010c754090 OUTLINED_FUNCTION_1 + 20208 53 SwiftUI 0x000000010c754188 OUTLINED_FUNCTION_1 + 20456 54 CoreFoundation 0x0000000180399c10 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 32 55 CoreFoundation 0x000000018039457c __CFRunLoopDoObservers + 512 56 CoreFoundation 0x0000000180394a20 __CFRunLoopRun + 948 57 CoreFoundation 0x0000000180394254 CFRunLoopRunSpecific + 584 58 GraphicsServices 0x0000000188eb7c9c GSEventRunModal + 160 59 UIKitCore 0x0000000109152ff0 -[UIApplication _run] + 868 60 UIKitCore 0x0000000109156f3c UIApplicationMain + 124 61 SwiftUI 0x000000010d1ff34c OUTLINED_FUNCTION_54 + 500 62 SwiftUI 0x000000010d1ff1ec OUTLINED_FUNCTION_54 + 148 63 SwiftUI 0x000000010c9f7474 OUTLINED_FUNCTION_16 + 88 64 realm-bug-example 0x00000001043e4318 $s17realm_bug_example0a1_b1_C3AppV5$mainyyFZ + 40 65 realm-bug-example 0x00000001043e43c4 main + 12 66 dyld 0x0000000107f81514 start_sim + 20 67 ??? 0x0000000108085f28 0x0 + 4429733672 68 ??? 0x2549000000000000 0x0 + 2686678652703211520 ) libc++abi: terminating due to uncaught exception of type NSException
Can you reproduce the bug?
Always
Reproduction Steps
I've created a repo here: https://github.com/GriffinMeyer/section-list-delete-bug
Simply building and running the app, adding multiple Todos and then swiping to delete will cause the app to crash.
This also happens when using a synced realm, and the object is deleted from another source, so the issue is not specifically with the delete code.
Version
10.41.0
What Atlas Services are you using?
Atlas Device Sync
Are you using encryption?
No
Platform OS and version(s)
iOS 16.4, iOS 17
Build environment
Xcode version: 14.3.1
Dependency manager and version: SPM