From b15b78346fe44afbdb81934606ab63252df96b66 Mon Sep 17 00:00:00 2001
From: Julian Rex <julian.rex@mapbox.com>
Date: Tue, 30 Apr 2019 16:11:14 -0400
Subject: [PATCH] [ios] Check for valid superview to avoid crash on iOS 9
 (#14529)

---
 platform/ios/CHANGELOG.md      | 1 +
 platform/ios/src/MGLMapView.mm | 5 ++++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/platform/ios/CHANGELOG.md b/platform/ios/CHANGELOG.md
index 0269d20041e..d3f6a7b5fb4 100644
--- a/platform/ios/CHANGELOG.md
+++ b/platform/ios/CHANGELOG.md
@@ -8,6 +8,7 @@ Mapbox welcomes participation and contributions from everyone. Please read [CONT
 * Fix a bug that wrong position of attribution dialog after rotation. ([#14185](https://github.com/mapbox/mapbox-gl-native/pull/14185))
 * Fixed a bug with jittery callout views when using sprite-based annotations. ([#14445](https://github.com/mapbox/mapbox-gl-native/pull/14445))
 * Improved `MGLLocationManager` optional protocol properties briding to Swift. ([#14477](https://github.com/mapbox/mapbox-gl-native/pull/14477))
+* Fixed a layout constraints crash on iOS 9 when a view is removed from its superview. ([#14529](https://github.com/mapbox/mapbox-gl-native/pull/14529))
 
 ## 4.10.0 - April 17, 2019
 
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];
 }