Only first QCommandLineOption with short name "h" will be parsed.

This won't be parsed

// Some comments here
QCommandLineOption hostNameOption(QStringList() << "h" << "hostname", "HTTP Server hostname.", "Hostname", "127.0.0.1");
parser.addOption(hostNameOption);

if previously was selected

parser.addHelpOption();

Possibly, short name "h" intersects with help option. If help option would be added after hostNameOption, only first (hostname) option with "h" short name would be accepted.

Maybe it's not a bug, but simply confusing bahaviour.