Please do try reproducing and provide additional information - which building and what game version you have.

Alright, I tried reproducing and was unable to get a crash. Though I did find in my testing that the ragdoll would bounce off the door when the door is closed (and the person is against it) and that when in the doorway of an open door, the ragdoll would get stuck in a wall and spaz out. The building was called "Shop 1 (inhabited) v1" in the editor and I have version Alpha 0.52.103507

I am unsure as to whether it was a random crash or if one of those caused a crash.

We need dxdiag and files from this folder for solve your problem. C:\Users\<Name>\AppData\Local\Arma 3 Alpha\

Can you upload somewhere in winrar package please?
When package will be smaller than 2,097k, so you can attach here. Thank you.

http://feedback.arma3.com/how-to-user.html.html

I haven't been able to get the crash again, I think it was just random. I'll include the items you requested though.

http://filesmelt.com/dl/DxDiag1.rar

Closing, since there are no dump files and the crash doesn't seem to be reproducable.

If you are able to repro it again, please create a new ticket with dump files.