Web UI tries to bind to IP "42" by default

[adduxa]

qBittorrent version and Operating System

qBittorrent v4.1.2
FreeBSD 11.2-RELEASE-p3 #4 r338638
Compiled from ports with nox

If on linux, libtorrent and Qt version

libtorrent-rasterbar: 1.1.9
qt5-core: 5.11.1

What is the problem

Error "Web UI: Unable to bind to IP: 42, port: 8080. Reason: The address is not available" at start with clean install without configs.

What is the expected behavior

Bind to 0.0.0.0, instead of 42

Steps to reproduce

1. Compile
2. Launch qbittorrent-nox

Extra info

If we look at https://github.com/qbittorrent/qBittorrent/blob/master/src/webui/webui.cpp#L96-L97, we can see "*" (asterisk) used as a default bind IP. And asterisk's ASCII code is 42.
I think there's automatic type detection problem somewhere.
Also, if we look at documentation, QHostAddress::Any is enum and not QHostAddress or string.
Shouldn't code above

            const auto address = (serverAddressString == "*" || serverAddressString.isEmpty())
                ? QHostAddress::Any : QHostAddress(serverAddressString);

be like

            const auto address = (serverAddressString == "*" || serverAddressString.isEmpty())
                ? QHostAddress(QHostAddress::Any) : QHostAddress(serverAddressString);

instead?

Workaround

Add

[Preferences]
WebUI\Address=*

to .config/qBittorrent/qBittorrent.conf

[Chocobo1]

Thanks for the report!
Already fixed in #9365, please wait for the next release (v4.1.3) or compile using our master branch.