From 036b495cb253f668e88c11813f750b0e537a32bd Mon Sep 17 00:00:00 2001
From: Manish Goregaokar <manishsmail@gmail.com>
Date: Wed, 10 Jul 2019 23:12:26 -0700
Subject: [PATCH] Error on invalid rotation values in XRRigidTransform
 constructor

---
 components/script/dom/xrrigidtransform.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/components/script/dom/xrrigidtransform.rs b/components/script/dom/xrrigidtransform.rs
index 5e1f720411e..ca73121d931 100644
--- a/components/script/dom/xrrigidtransform.rs
+++ b/components/script/dom/xrrigidtransform.rs
@@ -77,6 +77,12 @@ impl XRRigidTransform {
             orientation.z as f32,
             orientation.w as f32,
         );
+
+        if !rotate.i.is_finite() {
+            // if quaternion has zero norm, we'll get an infinite or NaN
+            // value for each element. This is preferable to checking for zero.
+            return Err(Error::InvalidState);
+        }
         let transform = TypedRigidTransform3D::new(rotate, translate);
         Ok(XRRigidTransform::new(&window.global(), transform))
     }