A debug log contains anything you do - at debug level that includes keystrokes and anything NVDA reads. What I always recommend:
1) Set NVDA's logging level to debug
2) Restart with add-ons disabled (you can do this in one step now - press NVDA+q then down arrow to "Restart NVDA with add-ons disabled and debug logging enabled", then enter)
3) Once NVDA restarts, recreate the issue you are reporting.
4) Get the log (Press NVDA+F1 to open the log, select all and copy it to a notepad file to save).
5) Reset log level and continue.
If you are unsure, feel free to create the issue, then capture the log and send it to either Sean or I offlist noting which issue it goes with. We can then make sure there is nothing confidential in there.
Kind regards
Quentin