From 57ca7d85eec35cd67c4d849eb6fd4e0cb3f9faaa Mon Sep 17 00:00:00 2001
From: Julian Rex <julian.rex@mapbox.com>
Date: Fri, 26 Apr 2019 19:37:05 -0400
Subject: [PATCH] [ios] Check for valid superview to avoid crash on iOS 9

---
 platform/ios/src/MGLMapView.mm | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/platform/ios/src/MGLMapView.mm b/platform/ios/src/MGLMapView.mm
index cadf5be3fd9..345ac64bc7e 100644
--- a/platform/ios/src/MGLMapView.mm
+++ b/platform/ios/src/MGLMapView.mm
@@ -1377,7 +1377,10 @@ - (void)didMoveToWindow
 - (void)didMoveToSuperview
 {
     [self validateDisplayLink];
-    [self installConstraints];
+    if (self.superview)
+    {
+        [self installConstraints];
+    }
     [super didMoveToSuperview];
 }