Kerbal Space Program

Accidentally hit Create while trying to Preview:

As reported in the Support (unmodded installs) forum by super, the following steps cause a crash (Win) or hang (Mac) in KSP 0.24.2:

1. Enter the editor
2. Choose a part
3. Remove the part
4. Choose another part
5. Undo part placement with Ctrl-z/Cmd-z
6. Launch the no-parts craft

The game crashes or hangs with two Exceptions:

ArgumentOutOfRangeException: Argument is out of range.
Parameter name: index
  at System.Collections.Generic.List`1[Part].get_Item (Int32 index) [0x00000] in <filename unknown>:0 
  at ShipConstruction.RestoreBackup (Int32 index) [0x00000] in <filename unknown>:0 
  at EditorLogic.UndoRedo () [0x00000] in <filename unknown>:0 
  at EditorLogic.UpdatePartMode () [0x00000] in <filename unknown>:0 
  at EditorLogic.Update () [0x00000] in <filename unknown>:0 

(Filename:  Line: -1)

NullReferenceException
  at (wrapper managed-to-native) UnityEngine.Component:InternalGetGameObject ()
  at UnityEngine.Component.get_gameObject () [0x00000] in <filename unknown>:0 
  at ShipConstruct.SaveShip () [0x00000] in <filename unknown>:0 
  at ShipConstruction.CreateBackup (.ShipConstruct ship) [0x00000] in <filename unknown>:0 
  at EditorLogic.launchVessel () [0x00000] in <filename unknown>:0 

(Filename:  Line: -1)

KSP: 0.24.2 Mac OS X 10.9.5
Mods installed: none
Output log: Player.log attached
Workaround: Only use undo when multiple parts are placed, or don't choose Launch immediately afterwards.

I am not able to get a crash or hang in 0.90, OS X 10.10.1. I am still getting the ArgumentOutOfRangeException, and some strange behavior in the VAB, so the bug is still present in 0.90.