Placing any block crashes the client, when playing on a server/ Although I only tested with a mine cart, a standard rail, and red dyed clay, but I'm suspicious it's every block.
Environment
java version "1.8.0_45"
Java(TM) SE Runtime Environment (build 1.8.0_45-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.45-b02, mixed mode)
Linux t**s-*** 3.16.0-53-generic #72~14.04.1-Ubuntu SMP Fri Nov 6 18:17:23 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
I have the same issue but it's not every block. In my case it was when I placed my 7th or 8th piece of cobblestone in a hole I dug out in the previous snapshot with no issues. Just a crash to launcher immediately. this is on single player, though afaik there is no distinction for the client anymore.