I haven't used my PI 3 in a long time, so when I booted it up again, I just got this:
"Caught <SEGV>, core dump failed"
The internet has ZERO explanations for this..
~A very tired person.
Does look like the SD card is corrupted. Either re-image the card, or if you need data from this one, get a new card, image that then using a USB/SD card adapter get the old data you need off the original card.