A series of Debug commands to be executed before the Debug prompt is
displayed. The string may be up to 255 characters long. All text on the
command line following :DEBUG is passed unaltered to Debug.
Note that the commands should not be quoted.
Discussion
The :DEBUG command enters Debug directly from the session
CI. Optional Debug commands may be entered on the command line,
and they will be executed before the Debug prompt is displayed.
If the optional commands contain a Debug command that returns
the user to the CI, any further commands are left pending on Debug's
command stack. The next time Debug is entered, any pending commands
are executed before the Debug prompt is displayed. If no commands
were specified, Debug displays its prompt and waits for the user
to enter interactive commands. This command is ignored in a job.
Example
The example below calls Debug to produce a stack trace and return to the CI.