From e7ddaa9285fc5e6433a1faed0bf0a426d34d596a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Minh=20Nguye=CC=82=CC=83n?= <mxn@1ec5.org>
Date: Tue, 19 Apr 2016 08:02:57 -0700
Subject: [PATCH] [ios] Assert that defaults change is on main thread

---
 platform/ios/src/MGLMapboxEvents.m | 1 +
 1 file changed, 1 insertion(+)

diff --git a/platform/ios/src/MGLMapboxEvents.m b/platform/ios/src/MGLMapboxEvents.m
index 0967257bf..681b95b87 100644
--- a/platform/ios/src/MGLMapboxEvents.m
+++ b/platform/ios/src/MGLMapboxEvents.m
@@ -240,6 +240,7 @@ const NSTimeInterval MGLFlushInterval = 180;
 }
 
 - (void)userDefaultsDidChange:(NSNotification *)notification {
+    MGLAssertIsMainThread();
     [self pauseOrResumeMetricsCollectionIfRequired];
 }