Merging offline DB created with different styles throws an error.

[fabian-guerra]

When an offline region created with style A is merged into an app that uses style B it throws the following error:

[DEBUG] {}[Database](1): BUG IN CLIENT OF libsqlite3.dylib: database integrity compromised by API violation: vnode unlinked while in use:

/cc @asheemmamoowala

[asheemmamoowala]

@fabian-guerra I used a locally created test DB (bounds around London in streets style). with the iOS demo app and was not able to reproduce this issue.

Code is @ https://github.com/mapbox/mapbox-gl-native/tree/investigate-13282
Steps I Used:

• Launch app in iOS Simulator (i used iPhone 8 image)
• Change to raster style
• Select Style building extrusions - which is hijacked to merge the test database.

Note: I changed the pack metadata decoding because it was created with mbgl-offline and does not contain an NSKeyedArchiver-based blob.

[fabian-guerra]

@asheemmamoowala perhaps this is the problem:

Note: I changed the pack metadata decoding because it was created with mbgl-offline and does not contain an NSKeyedArchiver-based blob.

I made a DB using mbgl-offline and I'm seeing this issue.

[asheemmamoowala]

So it turns out I didn't push my changes to the investigate branch ref'ed above. In any case, without the changes, I didn't get a crash in the sql code on macOS. the crash was in the macOS [OfflinePackNameValueTransformer transformedValue:(NSData *)context].

That should be an easy fix, but needs confirmation that it does get rid of the crash.

[fabian-guerra]

I don't get a crash I get the above message in the console.

I'm attaching the file I used to test.
tatl.db.zip

[stale]

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