It seems to be tied to "Safari Suggestions", so if you have that turned off you won't see the crash.
Also, I'm on the iPhone 11 or 12 I think? So maybe model has something to do with it?
Wholesome hacking
Turned it back on... still no crash. Search engine makes no difference.
Wonder if it's a cache thing and disabling Suggestions cleared that, removing whatever bad data was hanging around, or if it was a purely server-side bug and they've already fixed it.
[EDIT] Some others saying it stopped happening, so may have been fixed.