Error: android.database.CursorIndexOutOfBoundsException: Index 0 requested, with a size of 0

[rfc2822]

Guess it's this call:

ical4android/lib/src/main/kotlin/at/bitfire/ical4android/AndroidEvent.kt

Line 707 in 21622fe

if (!cursor.isNull(0)) // Events.STATUS != null

Discussed in bitfireAT/davx5-ose#1447

^{Originally posted by renyuneyun May 7, 2025}
Not sure whether it's DAVx5 causing this error, the server (Nextcloud) causing it or my Android OS causing it, so I'm posting it as a discussion first.

I get this error for two of my calendar collections, from time to time. But their contents are generally updated after synchronization.

NOTIFICATION TIME
Local time: 2025-05-07T14:50:25+01:00
UTC: 2025-05-07T13:50:25Z

SYNCHRONIZATION INFO
Account: Account {name=MY_EMAIL_ADDRESS, type=bitfire.at.davdroid}
Authority: com.android.calendar

android.database.CursorIndexOutOfBoundsException: Index 0 requested, with a size of 0
	at android.database.AbstractCursor.checkPosition(AbstractCursor.java:535)
	at android.database.AbstractWindowedCursor.checkPosition(AbstractWindowedCursor.java:139)
	at android.database.AbstractWindowedCursor.isNull(AbstractWindowedCursor.java:95)
	at android.database.CursorWrapper.isNull(CursorWrapper.java:187)
	at at.bitfire.ical4android.AndroidEvent.update(AndroidEvent.kt:52)
	at at.bitfire.davdroid.sync.CalendarSyncManager.processVEvent$lambda$14(CalendarSyncManager.kt:26)
	at at.bitfire.davdroid.sync.CalendarSyncManager.$r8$lambda$-yysUu1mnb5YKsSp5laPGSXWQjM(CalendarSyncManager.kt:1)
	at at.bitfire.davdroid.sync.CalendarSyncManager$$ExternalSyntheticLambda10.invoke(R8$$SyntheticClass:13)
	at at.bitfire.davdroid.sync.SyncException$Companion.wrapWithLocalResource(SyncException.kt:6)
	at at.bitfire.davdroid.sync.CalendarSyncManager.processVEvent(CalendarSyncManager.kt:140)
	at at.bitfire.davdroid.sync.CalendarSyncManager.downloadRemote$lambda$11$lambda$10$lambda$9(CalendarSyncManager.kt:111)
	at at.bitfire.davdroid.sync.CalendarSyncManager.$r8$lambda$xBRNK6FZsxb0c35R_GMkb1qDT8A(CalendarSyncManager.kt:1)
	at at.bitfire.davdroid.sync.CalendarSyncManager$$ExternalSyntheticLambda4.invoke(R8$$SyntheticClass:5)
	at at.bitfire.davdroid.sync.SyncException$Companion.wrapWithRemoteResource(SyncException.kt:6)
	at at.bitfire.davdroid.sync.CalendarSyncManager.downloadRemote$lambda$11$lambda$10(CalendarSyncManager.kt:22)
	at at.bitfire.davdroid.sync.CalendarSyncManager.$r8$lambda$is9u8vJ7VzS62N-UVw4ofat62j4(CalendarSyncManager.kt:1)
	at at.bitfire.davdroid.sync.CalendarSyncManager$$ExternalSyntheticLambda0.onResponse(R8$$SyntheticClass:3)
	at at.bitfire.dav4jvm.Response$Companion.parse(Response.kt:320)
	at at.bitfire.dav4jvm.DavResource.processMultiStatus$parseMultiStatus(DavResource.kt:51)
	at at.bitfire.dav4jvm.DavResource.processMultiStatus(DavResource.kt:18)
	at at.bitfire.dav4jvm.DavResource.processMultiStatus(DavResource.kt:9)
	at at.bitfire.dav4jvm.DavCalendar.multiget(DavCalendar.kt:69)
	at at.bitfire.dav4jvm.DavCalendar.multiget$default(DavCalendar.kt:12)
	at at.bitfire.davdroid.sync.CalendarSyncManager.downloadRemote$lambda$11(CalendarSyncManager.kt:18)
	at at.bitfire.davdroid.sync.CalendarSyncManager.$r8$lambda$3MqIM-UjL7npA99FHS230pOYtbQ(CalendarSyncManager.kt:1)
	at at.bitfire.davdroid.sync.CalendarSyncManager$$ExternalSyntheticLambda1.invoke(R8$$SyntheticClass:5)
	at at.bitfire.davdroid.sync.SyncException$Companion.wrapWithRemoteResource(SyncException.kt:6)
	at at.bitfire.davdroid.sync.CalendarSyncManager.downloadRemote(CalendarSyncManager.kt:54)
	at at.bitfire.davdroid.sync.SyncManager$syncRemote$1$download$1.invokeSuspend(SyncManager.kt:14)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:9)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:115)
	at kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.common.kt:77)
	at kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source:99)
	at kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source:3)
	at at.bitfire.davdroid.sync.SyncManager.syncRemote(SyncManager.kt:12)
	at at.bitfire.davdroid.sync.SyncManager.performSync(SyncManager.kt:424)
	at at.bitfire.davdroid.sync.CalendarSyncer.syncCollection(CalendarSyncer.kt:10)
	at at.bitfire.davdroid.sync.CalendarSyncer.syncCollection(CalendarSyncer.kt:1)
	at at.bitfire.davdroid.sync.Syncer.syncCollectionContents$davx5_ose_4_4_9_oseRelease(Syncer.kt:44)
	at at.bitfire.davdroid.sync.Syncer.sync$davx5_ose_4_4_9_oseRelease(Syncer.kt:42)
	at at.bitfire.davdroid.sync.Syncer.invoke(Syncer.kt:144)
	at at.bitfire.davdroid.sync.worker.BaseSyncWorker$doSyncWork$2.invokeSuspend$lambda$0(BaseSyncWorker.kt:1)
	at at.bitfire.davdroid.sync.worker.BaseSyncWorker$doSyncWork$2.$r8$lambda$MnrEU1_WtQZTTPjmMRztfG3Y7fo(BaseSyncWorker.kt:1)
	at at.bitfire.davdroid.sync.worker.BaseSyncWorker$doSyncWork$2$$ExternalSyntheticLambda0.invoke(R8$$SyntheticClass:3)
	at kotlinx.coroutines.InterruptibleKt$runInterruptible$2.invokeSuspend(Interruptible.kt:58)
	at kotlinx.coroutines.InterruptibleKt$runInterruptible$2.invoke(Interruptible.kt:13)
	at kotlinx.coroutines.intrinsics.UndispatchedKt.startUndspatched(Undispatched.kt:17)
	at kotlinx.coroutines.BuildersKt.withContext(Unknown Source:45)
	at kotlinx.coroutines.InterruptibleKt.runInterruptible$default(Interruptible.kt:9)
	at at.bitfire.davdroid.sync.worker.BaseSyncWorker$doSyncWork$2.invokeSuspend(BaseSyncWorker.kt:332)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:9)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:115)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:644)
	at java.lang.Thread.run(Thread.java:1012)

LOCAL RESOURCE
AndroidEvent(calendar=at.bitfire.davdroid.resource.LocalCalendar@ac202e1, id=285, event=Event(uid=SOME_UID, sequence=1, userAgents=[], recurrenceId=null, summary=SUMMARY_REMOVED, location=null, url=null, description=null, color=null, dtStart=DTSTART;TZID=Europe/London:20250512T110000
, dtEnd=DTEND;TZID=Europe/London:20250512T120000
, duration=null, rRules=[], exRules=[], rDates=[], exDates=[], exceptions=[], classification=null, status=null, opaque=true, organizer=null, attendees=[], alarms=[], lastModified=LAST-MODIFIED:20250430T091500Z
, categories=[], unknownProperties=[CREATED:20250428T175101Z
, X-MOZ-GENERATION:2
]))

REMOTE RESOURCE
https://MY_NEXT_CLOUD_SERVER/remote.php/dav/calendars/MY_USERNAME/CALENDAR_NAME/SOME_UID.ics

SYSTEM INFORMATION

Android version: 15 (PKR110_15.0.0.705(CN01))
Device: OnePlus PKR110 (OP60EBL1)

Locale(s): [zh_CN]
Time zone: Europe/London
Internal memory (/data): 120 GB free of 237 GB

App standby bucket: exempted (very good)
App exempted from power saving: yes (good)
System in power-save mode: no
System-wide synchronization: automatically



CONNECTIVITY

 ☒ wlan0
   - [ Transports: WIFI Capabilities: NOT_METERED INTERNET NOT_RESTRICTED TRUSTED NOT_VPN VALIDATED NOT_ROAMING FOREGROUND NOT_CONGESTED NOT_SUSPENDED NOT_VCN_MANAGED NOT_BANDWIDTH_CONSTRAINED LinkUpBandwidth>=73764Kbps LinkDnBandwidth>=67686Kbps TransportInfo: <SSID: <unknown ssid>, BSSID: 02:00:00:00:00:00, MAC: 02:00:00:00:00:00, IP: /192.168.4.200, Security type: 2, Supplicant state: COMPLETED, Wi-Fi standard: 11ac, RSSI: -40, Link speed: 360Mbps, Tx Link speed: 360Mbps, Max Supported Tx Link speed: 400Mbps, Rx Link speed: 400Mbps, Max Supported Rx Link speed: 400Mbps, Frequency: 5785MHz, Net ID: -1, Metered hint: false, score: 60, isUsable: true, CarrierMerged: false, SubscriptionId: -1, IsPrimary: -1, Trusted: true, Restricted: false, Ephemeral: false, OEM paid: false, OEM private: false, OSU AP: false, FQDN: <none>, Provider friendly name: <none>, Requesting package name: <none><none>MLO Information: , Is TID-To-Link negotiation supported by the AP: false, AP MLD Address: <none>, AP MLO Link Id: <none>, AP MLO Affiliated links: <none>, Vendor Data: <none>> SignalStrength: -40 UnderlyingNetworks: Null]
   - DNS: 180.76.76.76, 223.5.5.5
 ☐ rmnet_data7
   - [ Transports: CELLULAR Capabilities: IMS NOT_METERED TRUSTED NOT_VPN VALIDATED NOT_ROAMING FOREGROUND NOT_CONGESTED NOT_SUSPENDED NOT_VCN_MANAGED MMTEL NOT_BANDWIDTH_CONSTRAINED LinkUpBandwidth>=15000Kbps LinkDnBandwidth>=30000Kbps Specifier: <TelephonyNetworkSpecifier [mSubId = 2]> SubscriptionIds: {2} UnderlyingNetworks: Null]
   - DNS: 
 ☐ rmnet_data8
   - [ Transports: CELLULAR Capabilities: IMS NOT_METERED TRUSTED NOT_VPN VALIDATED FOREGROUND NOT_CONGESTED NOT_SUSPENDED NOT_VCN_MANAGED MMTEL NOT_BANDWIDTH_CONSTRAINED LinkUpBandwidth>=18000Kbps LinkDnBandwidth>=47000Kbps Specifier: <TelephonyNetworkSpecifier [mSubId = 1]> SubscriptionIds: {1} UnderlyingNetworks: Null]
   - DNS: 

Data saver: disabled



CONFIGURATION

Notifications:
 - sync isBlocked=false
  * syncProblems: importance=3
  * syncIoErrors: importance=1
  * syncWarnings: importance=2
 - status: importance=2
 - general: importance=3
 - debug: importance=4

Permissions:
 - ACCESS_NETWORK_STATE: granted
 - ACCESS_WIFI_STATE: granted
 - INTERNET: granted
 - POST_NOTIFICATIONS: granted
 - READ_SYNC_SETTINGS: granted
 - READ_SYNC_STATS: granted
 - WRITE_SYNC_SETTINGS: granted
 - RECEIVE_BOOT_COMPLETED: granted
 - REQUEST_IGNORE_BATTERY_OPTIMIZATIONS: granted
 - READ_CONTACTS: granted
 - WRITE_CONTACTS: granted
 - READ_CALENDAR: granted
 - WRITE_CALENDAR: granted
 - ACCESS_COARSE_LOCATION: granted
 - ACCESS_FINE_LOCATION: granted
 - ACCESS_BACKGROUND_LOCATION: granted
 - WAKE_LOCK: granted
 - FOREGROUND_SERVICE: granted
 - org.dmfs.permission.READ_TASKS: denied
 - org.dmfs.permission.WRITE_TASKS: denied
 - org.tasks.permission.READ_TASKS: denied
 - org.tasks.permission.WRITE_TASKS: denied
 - at.techbee.jtx.permission.READ: granted
 - at.techbee.jtx.permission.WRITE: granted
 - at.bitfire.davdroid.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION: granted

(I chose the most relevant parts, with some sensitive information removed. Can provide further information if required.)