Crack in base of toilet.

[Bob_zyouruncle]

I'll try this again.
I posted twice but must be doing something wrong.
I've just noticed a hairline crack that goes from the bolt to the part that the waste passes through.
There's no leak.
Does it need to be repaired or replaced? Can I leave it as is.
Thank you.

 

[Peterson]

It should be replaced. It's cracked now, but could split/shatter the next time somebody plops down on the seat.