In /usr/bin/nocache line 6:
case "$opt" in
^-- SC2220: Invalid flags are not handled. Add a *) case.


In /usr/bin/nocache line 16:
[ ! -z "$debugfd" ] && echo "[nocache] DEBUG: Executing: $@" >&$debugfd
  ^-- SC2236: Use -n instead of ! -z.
                                                         ^-- SC2145: Argument mixes string and array. Use * or separate argument.

For more information:
  https://www.shellcheck.net/wiki/SC2145 -- Argument mixes string and array. ...
  https://www.shellcheck.net/wiki/SC2220 -- Invalid flags are not handled. Ad...
  https://www.shellcheck.net/wiki/SC2236 -- Use -n instead of ! -z.