1. Open my project

2. Go to Animation mode

3. Choose one animation

4. Crashes (some animations is fine, other animations is crushed)

   <provide log file>
   Spine Launcher 2.0.20-full
   Mac OS X x86_64 10.10.1
   Java 1.7.0_51 Oracle Corporation
   Java HotSpot(TM) 64-Bit Server VM
   Up to date: 2.1.07
   Licensed to: *****, *****
   Spine 2.1.07 Professional, JGLFW
   Intel Inc.
   Intel Iris OpenGL Engine
   2.1 INTEL-10.0.86
   Started.
   Automatic backup complete.
   Automatic backup complete.
   Automatic backup complete.
   Automatic backup complete.
   Automatic backup complete.
   Automatic backup complete.
   An unexpected error has occurred:
   java.lang.ArrayIndexOutOfBoundsException: -1
   at gs.a(SourceFile:128)
   at kh.a(SourceFile:759)
   at jY.a(SourceFile:78)
   at xz.a(SourceFile:300)
   at com.esotericsoftware.spine.editor.Editor.c(SourceFile:622)
   at rq.a(SourceFile:975)
   at Bw.a(SourceFile:120)
   at fm.a(SourceFile:28)
   at dB.a(SourceFile:181)
   at dB.a(SourceFile:146)
   at fH.k(SourceFile:190)
   at fH.a(SourceFile:52)
   at fk.a(SourceFile:40)
   at com.badlogic.gdx.scenes.scene2d.ui.List.i(SourceFile:84)
   at eo.a(SourceFile:68)
   at dH.a(SourceFile:55)
   at dB.a(SourceFile:181)
   at dB.a(SourceFile:146)
   at dJ.a(SourceFile:276)
   at o.a(SourceFile:90)
   at aq.a(SourceFile:87)
   at q.a(SourceFile:77)
   at ap.e(SourceFile:138)
   at ac.e(SourceFile:212)
   at lA.e(SourceFile:89)
   at ah.run(SourceFile:188)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:733)
   at java.awt.EventQueue.access$200(EventQueue.java:103)
   at java.awt.EventQueue$3.run(EventQueue.java:694)
   at java.awt.EventQueue$3.run(EventQueue.java:692)
   at java.security.AccessController.doPrivileged(Native Method)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:703)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)

Now I find the reason.

1. That spine file has many animation.
2. I move slots and child keys that 'A' key has to 'B' key.
3. Translate 'A' key
4. Move the slots and child keys to 'A' key back.
5. Animation Mode
6. Choose some Animation
7. Crushed

It is the thing.