After destroying a GVRKeyboard component, adding a new one will crash Unity

[Moncader]

Summary:
Exactly as the title says.

Found using:

• Google VR SDK version: v1.130.1
• Unity version: 2018.1.0f2
• Phone manufacturer, model, and O/S version: All Daydream devices
• Viewer manufacturer & model: All Daydream Views

Steps to reproduce the issue:

1. Add a GVRKeyboard component to a GameObject in a scene.
2. Destroy that GameObject or GVRKeyboard component.
3. Add another GVRKeyboard component to a GameObject in a scene.
4. Unity will crash.

Workarounds:

--- a/Assets/GoogleVR/Scripts/Keyboard/GvrKeyboard.cs
+++ b/Assets/GoogleVR/Scripts/Keyboard/GvrKeyboard.cs
@@ -131,6 +131,8 @@ public class GvrKeyboard : MonoBehaviour {

   void OnDestroy() {
     instance = null;
+
+    threadSafeCallbacks.Clear();
   }

   // Use this for initialization.

The above will make everything work again.

[rusmaxham]

Thanks for reporting this. This will be fixed in the next release.

[rusmaxham]

This is now fixed in the latest release.