From d581707f360965ae4252e05c000778fb5e1ea5a7 Mon Sep 17 00:00:00 2001
From: "Hart, Kenneth Arthur" <khart@gatech.edu>
Date: Mon, 21 Jan 2019 00:54:19 -0500
Subject: [PATCH] added catch in AABB overlap detection if either is
 uninitialized

---
 aabbtree.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/aabbtree.py b/aabbtree.py
index eb66615..8bb685b 100644
--- a/aabbtree.py
+++ b/aabbtree.py
@@ -141,6 +141,9 @@ def overlaps(self, aabb):
         Returns:
             bool: Flag set to true if the two AABBs overlap
         """
+        if (self.limits is None) or (aabb.limits is None):
+            return False
+
         for lims1, lims2 in zip(self, aabb):
             min1, max1 = lims1
             min2, max2 = lims2