Crashes when running basic iosapp from Xcode

[hallahan]

I cloned the repo and built the basic iosapp in Xcode. The simulator launches, but the standard Maplibre tiles do not render properly. Then, the app crashes due to a segfault.

To Reproduce
Clone repo. Initialize submodules

cd platform/ios
make iproj

Xcode opens, and then we build the project.

The simulator opens. After a while, I see rendered content, but it is a garbled result.

After another 30 or so seconds, I get the following error:

Thread 1: EXC_BAD_ACCESS (code=1, address=0x25ff8ffc0)

This is in the draw function within render_line_layer.cpp.

This is my stack:

I am also seeing other errors such as:

'cyclone' is not a recognized processor for this target (ignoring processor)

2022-10-03 09:54:50.426402-0700 MapLibre GL[63245:1050115] Task <7C5A4AF5-E3F0-47E9-ABC7-65BF35ACCDB4>.<2> finished with error [-1001] Error Domain=NSURLErrorDomain Code=-1001 "The request timed out." UserInfo={_kCFStreamErrorCodeKey=-2103, _NSURLErrorFailingURLSessionTaskErrorKey=LocalDataTask <7C5A4AF5-E3F0-47E9-ABC7-65BF35ACCDB4>.<2>, _NSURLErrorRelatedURLSessionTaskErrorKey=(
    "LocalDataTask <7C5A4AF5-E3F0-47E9-ABC7-65BF35ACCDB4>.<2>"
), NSLocalizedDescription=The request timed out., NSErrorFailingURLStringKey=https://demotiles.maplibre.org/style.json, NSErrorFailingURLKey=https://demotiles.maplibre.org/style.json, _kCFStreamErrorDomainKey=4}
2022-10-03 09:54:50.426814-0700 MapLibre GL[63245:1050115] Task <16448039-CAF4-4AF4-A4BE-BC2F580EEC6C>.<3> finished with error [-1001] Error Domain=NSURLErrorDomain Code=-1001 "The request timed out." UserInfo={_kCFStreamErrorCodeKey=-2103, _NSURLErrorFailingURLSessionTaskErrorKey=LocalDataTask <16448039-CAF4-4AF4-A4BE-BC2F580EEC6C>.<3>, _NSURLErrorRelatedURLSessionTaskErrorKey=(
    "LocalDataTask <16448039-CAF4-4AF4-A4BE-BC2F580EEC6C>.<3>"
), NSLocalizedDescription=The request timed out., NSErrorFailingURLStringKey=https://demotiles.maplibre.org/tiles/tiles.json, NSErrorFailingURLKey=https://demotiles.maplibre.org/tiles/tiles.json, _kCFStreamErrorDomainKey=4}
2022-10-03 09:54:50.427107-0700 MapLibre GL[63245:1050115] Task <EC0EEFC5-E508-4562-91C9-94763C3A51BA>.<4> finished with error [-1001] Error Domain=NSURLErrorDomain Code=-1001 "The request timed out." UserInfo={_kCFStreamErrorCodeKey=-2103, _NSURLErrorFailingURLSessionTaskErrorKey=LocalDataTask <EC0EEFC5-E508-4562-91C9-94763C3A51BA>.<4>, _NSURLErrorRelatedURLSessionTaskErrorKey=(
    "LocalDataTask <EC0EEFC5-E508-4562-91C9-94763C3A51BA>.<4>"
), NSLocalizedDescription=The request timed out., NSErrorFailingURLStringKey=https://demotiles.maplibre.org/tiles/0/0/0.pbf, NSErrorFailingURLKey=https://demotiles.maplibre.org/tiles/0/0/0.pbf, _kCFStreamErrorDomainKey=4}

Platform information (please complete the following information):

• OS: MacBook Air (M1, 2020) macOS Monterey Version 12.5.1
• Platform: iOS Simulator iPad (9th generation)
• Version: Master branch

Additional context
I just want to build the project in xcode, have a simulator or Cocoa app, and be able to set breakpoints and debug core code. Is this the best way to do this? What is a better approach?

[hallahan]

Another error that may shed some light:

2022-10-03 10:14:40.796693-0700 MapLibre GL[63715:1061248] [DEBUG] {}[Database](283): recovered 5 frames from WAL file /Users/n/Library/Developer/CoreSimulator/Devices/1E6257F1-3B49-4DB7-A932-3F213E3750B6/data/Containers/Data/Application/1A3FECC3-2F49-4DAC-863C-815E91848F41/Library/HTTPStorages/org.maplibre.maplibregl/httpstorages.sqlite-wal

[hallahan]

I also checked out ios-v5.12.2, and I am having the same crash.

[roblabs]

@hallahan — Thank you for testing & submitting this issue.

This is a duplicate of #268 (comment), and my suggested workaround is posted there (and here for clarity):

Simulators running iOS 14 & 16 do not have an exception. iOS 15 does.

• Here are the other issues related to: https://github.com/maplibre/maplibre-gl-native/labels/Apple%20Silicon

[hallahan]

Interesting. Has anyone determined the actual root cause?

Upgrading my OS and installing Xcode 24. 🤞

[hallahan]

The upgrade resolved the crashing. I am still seeing weird rendering artifacts, though they are less extreme. I attached a video showing the flashes and the odd fragrments.

Is there a different issue relating to this?

I will close this issue and open or add to another regarding the rendering artifact below.

Simulator.Screen.Recording.-.iPad.9th.generation.-.2022-10-03.at.16.09.24.mp4

[roblabs]

Yes, the weird polygons you are reporting are similar to #268 (comment).

I recommend closing this and tracking progress on the other issues.