Mapbox-gl-js: Destroy gl buffers after calling Source#reload

[ansis]

mapbox-gl-js version: 0.15.0

Steps to Trigger Behavior

1. map.style.sources[vectorTileSourceName].reload()
   

   Expected Behavior

The GL buffers from the old buckets are destroyed.

Actual Behavior

The GL buffers from the old buckets are not destroyed.

When vector tiles are reloaded, only loadVectorData is called. The existing buckets and their gl buffers are never destroyed
https://github.com/mapbox/mapbox-gl-js/blob/2b809ddaf3be1547dd485a2d968f0cc9efbf4fd1/js/source/vector_tile_source.js#L74-L100

[ryd0rz]

Any progress on this? We are having issues with Mapbox-gl-js on iOS. Even after completely removing the script, and adding the script back in, we are seeing the error:
Terminated due to memory error.
After loading mapbox about 5 times.

We've tried everything from using the mapboxgl.remove(), to removing script and reloading dynamically for every map creation.

[wandergis]

@ansis Have you solved this problem? I also have this problem when call geojson source setData().

[wandergis]

@lucaswoj How to destory the GL buffers from the old buckets? Can you give me some advice？
Thanks very much.

[wandergis]