Put the summary of the bug you're having here

What I expected to happen was...:
I was testing out 1.9 (This was after it was fully released) and was tryting to get to the end, so i got eyes of ender and travelled to where it said the stronghold was.

What actually happened was...:
I dug and found no such stronghold, i repeated this four times, twice i got a stronghold but no portal (Double checked by going into spectator mode) and two times there was no stronghold at all.

Steps to Reproduce:
1. Get eyes of ender
2. Navigate to where they say a stronghold/portal is.
3. Note that there is no portal or stronghold.