What does it mean with bug report captured in android tablet?

Question

I was playing around with my tablet and testing my program, when there was a notification that said bug report captured and whether I would like to share it. I had not seen this message before so I clicked Yes, and then I clicked OK on the warning dialog box that asked me to share it only with people I trust. After that the gmail app opened up which had a screenshot of my tablet, as well as a file attached to it called bugreport<some numbers, date and time I think>.txt. I did not send the bug report as I was not sure what it was and where it would go. However my question is,

what exactly is this bug report?

Is it generated by the code that I was testing? Or is it generated by the android system itself?

Did I trigger something unknowingly when I pressed the hardware buttons (the tablet only has 3 hardware buttons, volume up/down and power)?

I have been trying but I cannot make that message appear again, and when I search for bug*.txt using my file viewer app, I cannot find the file. Where is that .txt fil that got attached to the bug report get saved on my tablet?

Answer 1

It's because you have turned on USB debugging in Developer Options. You can create a bug report by holding the power + both volume up and down.

Edit: This is what the forums say:

By pressing Volume up + Volume down + power button, you will feel a vibration after a second or so, that's when the bug reporting initiated.

To disable:

/system/bin/bugmailer.sh must be deleted/renamed.

There should be a folder on your SD card called "bug reports".

Have a look at this thread: http://forum.xda-developers.com/showthread.php?t=2252948

And this one: http://forum.xda-developers.com/showthread.php?t=1405639