I'm on grub 2.06 in ubuntu 22.04
grub> [ a -gt 9 ]; echo $? 1 grub> [ ! a -gt 9 ]; echo $? error: unrecognized number. 0 grub> [ a -lt 9 ]; echo $? error: unrecognized number. 0 grub> [ ! a -lt 9 ]; echo $? 1 grub> [ a -eq 9 ]; echo $? 1 grub> [ ! a -eq 9 ]; echo $? error: unrecognized number. 0 Why does it show/hide the error depending on the negation? Evidently, the error should be shown each time, one of the args is not a number in each example.
