Crash occurred when exit play mode while multiple scenes was loaded which were baked together first and then separate.

Repro:
-Ensure there is no baked info
-Select scenes 1, 2 and 3 and multibake it from the menu
-Delete the baked folder
-Now open individual scenes and bake them separately
NOTE: there is an error stating that the asset is corrupted (sometimes)
-Play scene GenerateStuff play and add scenes using space and finally stop - Unity crashes

reproducible in Version 5.3.0p1 (1e2decc4fa01)