Add reject statement to allow workers to fail properly

src/layer/GeoJSONWorkerLayer.js

@@ -150,7 +150,7 @@ class GeoJSONWorkerLayer extends Layer {
         } else {
           resolve();
         }
-      });
+      }).catch(reject);
     });
   }
 
@@ -775,7 +775,7 @@ class GeoJSONWorkerLayer extends Layer {
             });
           });
         });
-      });
+      }).catch(reject);
     });
   }
 

src/util/WorkerPool.js

@@ -98,7 +98,7 @@ class WorkerPool {
 
       // Return result in deferred task promise
       task.deferred.resolve(result);
-    });
+    }).catch(task.deferred.reject);
   }
 }