I recently dual booted linux mint on my laptop, and I came across the infinite squashfs error (an infinite amount of “SQUASHFS error: Unable to read page” and "SQUASHFS error: Unable to read data counting up, I think because I took out the usb and pressed enter too quickly) I couldn’t do anything, so I shut down and restarted, upon restart, its running fine? No corruption.
Edit: I reinstalled and waited a while after unplugging before and enter did not work, I hit escape and this happened again, though text is bigger and slower
if the install had finished and the installer was simply reading the flash drive to clean itself up, unmount filesystems and reboot, then chances are you are fine. However, as a personal rule I never allow an installation to go into production if there were any unexpected anomalies during installation. its just not worth the risk.