Riding A Pig a Letting a creeper explode the pig causes a crash

Put the summary of the bug you're having here

*What I expected to happen was...
I was riding a pig and having fun a letting creepers explode around me but

What actually happened was...:
Instead it crashed the game when the pig died because the explosion of one creeper

Steps to Reproduce:
1. put a saddle on a pig then ride it
2. spawn a creeper and let it explode
3. CRASH!!