Plugging electric bass guitar into guitar amp

Answer

Yes it's completely fine, but the sound most likely won't be as profound as you'd have with a dedicated bass amp that is more "tuned" for lower frequencies.

Although I only connected an electric bass guitar to a general-purpose amplifier myself.

And once I used a pretty big bass guitar amp as my electric guitar amp for a few months, as I recall, when I was playing powerful riffs the sound was awesome.