function::warn - Send a line to the warning stream

msg
           The formatted message string

       This function sends a warning message immediately to staprun. It is also sent over the bulk transport
       (relayfs) if it is being used. If the last characater is not a newline, the one is added.

       function::warn - Send a line to the warning stream

tapset::logging(3stap)

SystemTap Tapset Reference                         April 2024                              FUNCTION::WARN(3stap)

           warn(msg:string)