To reproduce:
1. Open attached Unity project "ResetEditor.zip"
2. Open scene "Scene"
3. Click on ObjectBug in the Hierarchy
4. Press ctrl+y (redo) on the keyboard

Expected result: nothing should change, ctrl+y (redo) can only be used once for every use of ctrl+z (undo) before it.
Actual result: ctrl+y (redo) can be used indefinetely and it just keeps redoing "MonoBehaviourScriptEditor" script (see Console messages)

Reproduced on: 5.5.0f3, 5.5.3f1, 5.5.3p1, 5.5.3p2
Not reproduced on: Any 5.6 versions, any 2017 versions.

Note: adding a material to the "ObjectNoBug" that has a Mesh Renderer component makes it reproduce the bug too.