[core] Make ActorRef methods const

So that the lambdas calling these methods do not have to be mutable.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/mbgl/renderer/image_manager.cpp b/src/mbgl/renderer/image_manager.cpp
index 860de487e7..936dac75c3 100644
--- a/src/mbgl/renderer/image_manager.cpp
+++ b/src/mbgl/renderer/image_manager.cpp
@@ -183,7 +183,7 @@ void ImageManager::checkMissingAndNotify(ImageRequestor& requestor, const ImageR
 
                 auto actorRef = callback->self();
                 emplaced.first->second.callbacks.emplace(dependency.first, std::move(callback));
-                observer->onStyleImageMissing(dependency.first, [actorRef]() mutable {
+                observer->onStyleImageMissing(dependency.first, [actorRef]() {
                     actorRef.invoke(&Callback::operator());
                 });