reporter-prompt-for-summary-p

reporter-prompt-for-summary-p is a variable defined in `reporter.el'.
Its value is

nil

Documentation:
Interface variable controlling prompting for problem summary.
When non-nil, `reporter-submit-bug-report' prompts the user for a
brief summary of the problem, and puts this summary on the Subject:
line. If this variable is a string, that string is used as the prompt
string.

Default behavior is to not prompt (i.e. nil). If you want reporter to
prompt, you should `let' bind this variable before calling
`reporter-submit-bug-report'. Note that this variable is not
buffer-local so you should never just `setq' it.