Client crashes when putting a crafting table, or other blocks on another blocks. (Survival)

Incomplete without a crash report. Please attach it so the issue can be diagnosed.

Crash report for 15w49a. Happens every time I try to place the crafting table. It does not matter what type of block I try to place the table on. Crashes every time. 15w47c did not have this issue. If you need any additional information, feel free to contact me