[core] don't store error state

Previously, we could first get a stale response from cache, then immediately a "connection error" response that overwrote the error state variable. In the tileLoadingCompleteCallback, we'd only see the second overwritten error state and abort. This could lead to the map sometimes not being rendered at all until the user interacts with the map.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/mbgl/map/raster_tile_data.hpp b/src/mbgl/map/raster_tile_data.hpp
index 34a79cad4c..e8efde48e4 100644
--- a/src/mbgl/map/raster_tile_data.hpp
+++ b/src/mbgl/map/raster_tile_data.hpp
@@ -16,7 +16,7 @@ public:
     RasterTileData(const TileID&, TexturePool&, Worker&);
     ~RasterTileData();
 
-    using Callback = std::function<void()>;
+    using Callback = std::function<void(std::exception_ptr)>;
 
     void request(const std::string& url,
                  const Callback& callback);