EXC_BAD_ACCESS: ODM2RetryCount > KERN_INVALID_ADDRESS at 0x8.

[RL-William-Coates]

We are seeing a production crash in the Google ODM path when Adjust initialises and forwards the first-launch timestamp to GoogleAdsOnDeviceConversion.

The crash happens while ODM persists its internal store:

• ODCConversionStore writeToFile
• NSDictionary writeToURL:error:
• NSPropertyListSerialization
• CFPropertyListCreateData

This looks like an invalid/corrupted object graph or a concurrent mutation during property-list serialisation inside the ODM SDK persistence layer.

Integration details

We are integrating Adjust via Swift Package Manager.

Resolved package versions:
adjust/ios_sdk: 5.6.2
googleads/google-ads-on-device-conversion-ios-sdk: 3.5.0

Crash

EXC_BAD_ACCESS: MatchFoundTimestamp >

Tags

• device: iPhone13,1
• device.class: high
• device.family: iOS
• dist: 199
• environment: production
• handled: no
• level: fatal
• mechanism: mach
• os: iOS 26.4.2
• os.build: 23E261
• os.name: iOS
• os.rooted: no

Exception

Exception 1

Type: EXC_BAD_ACCESS
Value: ODM2RetryCount >
KERN_INVALID_ADDRESS at 0x8.

Stacktrace

 CFGetTypeID in unknown file [Line null] (Not in app)
 _CFAppendXML0 in unknown file [Line null] (Not in app)
 _CFAppendXML0 in unknown file [Line null] (Not in app)
 _CFPropertyListCreateXMLData in unknown file [Line null] (Not in app)
 CFPropertyListCreateData in unknown file [Line null] (Not in app)
 +[NSPropertyListSerialization dataWithPropertyList:format:options:error:] in unknown file [Line null] (Not in app)
 -[NSDictionary(NSDictionary) writeToURL:error:] in unknown file [Line null] (Not in app)
 -[ODCConversionStore writeToFile] in unknown file [Line null] (In app)
 -[ODCConversionStore setObject:forKey:] in unknown file [Line null] (In app)
 -[ODCConversionStore setFirstLaunchTimestamp:] in unknown file [Line null] (In app)
 -[ODCConversionService setFirstLaunchTimeOnWorkerQueue:] in unknown file [Line null] (In app)
 __43-[ODCConversionService setFirstLaunchTime:]_block_invoke in unknown file [Line null] (In app)
 _dispatch_call_block_and_release in unknown file [Line null] (Not in app)
 _dispatch_client_callout in unknown file [Line null] (Not in app)
 _dispatch_lane_serial_drain in unknown file [Line null] (Not in app)
 _dispatch_lane_invoke in unknown file [Line null] (Not in app)

Thread: Thread 2 (crashed)

Stacktrace

 CFGetTypeID in unknown file [Line null] (Not in app)
 _CFAppendXML0 in unknown file [Line null] (Not in app)
 _CFAppendXML0 in unknown file [Line null] (Not in app)
 _CFPropertyListCreateXMLData in unknown file [Line null] (Not in app)
 CFPropertyListCreateData in unknown file [Line null] (Not in app)
 +[NSPropertyListSerialization dataWithPropertyList:format:options:error:] in unknown file [Line null] (Not in app)
 -[NSDictionary(NSDictionary) writeToURL:error:] in unknown file [Line null] (Not in app)
 -[ODCConversionStore writeToFile] in unknown file [Line null] (In app)
 -[ODCConversionStore setObject:forKey:] in unknown file [Line null] (In app)
 -[ODCConversionStore setFirstLaunchTimestamp:] in unknown file [Line null] (In app)
 -[ODCConversionService setFirstLaunchTimeOnWorkerQueue:] in unknown file [Line null] (In app)
 __43-[ODCConversionService setFirstLaunchTime:]_block_invoke in unknown file [Line null] (In app)
 _dispatch_call_block_and_release in unknown file [Line null] (Not in app)
 _dispatch_client_callout in unknown file [Line null] (Not in app)
 _dispatch_lane_serial_drain in unknown file [Line null] (Not in app)
 _dispatch_lane_invoke in unknown file [Line null] (Not in app)