From f10c7e2a5bb0295f3f08216e69d3dd52083f7efd Mon Sep 17 00:00:00 2001
From: Julian Rex <julian.rex@mapbox.com>
Date: Tue, 10 Jul 2018 09:12:52 -0400
Subject: Bail early if snapshotter completion block is NULL.

---
 platform/darwin/src/MGLMapSnapshotter.mm | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/platform/darwin/src/MGLMapSnapshotter.mm b/platform/darwin/src/MGLMapSnapshotter.mm
index e8ffe054a6..eff15dfcec 100644
--- a/platform/darwin/src/MGLMapSnapshotter.mm
+++ b/platform/darwin/src/MGLMapSnapshotter.mm
@@ -187,7 +187,8 @@ const CGFloat MGLSnapshotterMinimumPixelSize = 64;
 
         strongSelf.loading = false;
 
-        MGLMapSnapshotCompletionHandler callback = strongSelf.completion;
+        if (!strongSelf.completion)
+            return;
 
         if (mbglError) {
             NSString *description = @(mbgl::util::toString(mbglError).c_str());
-- 
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