cpc.sh: let: k=: syntax error: operand expected (error token is "=") about hashclash HOT 3 CLOSED

This script has been used many times as is, without the third parameter.
I'm not sure why the script completely fails in your case.
Even if $3 is empty and the let k=$3 errors, then still $k should be empty and the next lines should set it to 0.
Can you give a bit more info on linux distro & shell used?

A workaround in your case would be to pass 0 as 3rd parameter.

from hashclash.

It doesn't fail hopefully. Just report this error then keep going assuming k is 0.
I'm using Ubuntu 21.04 (hirsute), with bash 5.1.4(1)-release

from hashclash.

Ok, good to hear it actually does continue as it should. But error message should be fixed now as well.

from hashclash.