Trying to access array offset on value of type bool in image.module

Thanks @Liam Morland!

Is this issue still relevant? I see that the Features module does pass PHP 8 tests currently ( https://www.drupal.org/node/401392/qa → ), so I am curious if this was a D7 core issue, which was fixed by some other issue, or it was a Features bug (probably sending an incomplete data to the image_style_flush), which is already fixed.

I don't know anymore. I'm not using Drupal 7 anymore. It's a simple fix, though.