A small bug report: If I enter 0 as an input number in one of the commands, I get a Javascript stack trace in the console :] TypeError: blockMap[arg].value

A small bug report: If I enter 0 as an input number in one of the commands, I get a Javascript stack trace in the console :] TypeError: blockMap[arg].value.replace is not a function at /home/ubuntu/unix50/web/src/webserver.js:1032:182 at Array.map (<anonymous>) at /home/ubuntu/unix50/web/src/webserver.js:1032:50 at Array.forEach (<anonymous>) at buildUnixCommandVertical (/home/ubuntu/unix50/web/src/webserver.js:1025:18) at buildUnixCommand (/home/ubuntu/unix50/web/src/webserver.js:920:20) at /home/ubuntu/unix50/web/src/webserver.js:1042:19 at Layer.handle [as handle_request] (/home/ubuntu/unix50/web/src/node_modules/express/lib/router/layer.js:95:5) at next (/home/ubuntu/unix50/web/src/node_modules/express/lib/router/route.js:137:13) at Route.dispatch (/home/ubuntu/unix50/web/src/node_modules/express/lib/router/route.js:112:3) Edit: ooh and it's vulnerable to shell command injection... and the VM has internet access. Problem reported.