[kbenson]

The GPL license is license-viral, the BSD license is just attribution-viral, as I understand it.

For BSD licensed code, you must reproduce the license and attribution for that code, but the rest of the code can be licensed as you want. For GPL code there are additional requirements.

[EdSchouten]

But does Copilot reproduce the license and attribution for the code? As far as I know, it does not.

[kbenson]

I don't think so, which makes the resulting amalgamation in violation of the original source in that respect for both of them. Beyond that, even if you add the license and attribution manually, the GPL is still not satisfied, and may require the entire source it was used in be released depending on whether you've shipped that product to customers or used it in specific ways. That's an entirely different class of problem than just needing to go back and add some comments to your code to note where some of it came from.