bug#74879: 30.0.92; trusted-content-p and trusted-files cannot be used for non-file buffers

[Stefan Monnier]

> Random thought:
>
> - What if a user pastes text from a untrusted source to a trusted buffer?
>
> - Is taint checking relevant in this context?
>
>     https://en.wikipedia.org/wiki/Taint_checking

I'll just repeat that trust sucks.
It's a last recourse and we should work to implement better solutions.


        Stefan