"Hi, today, we’re updating the stable stream. We fixed the problem with crashes on startup, which some users got with the previous build. Also, Chromium was updated to version 57.0.2987.133".
hi
I found reason and solution:)
I think it doesn't matter which OS.
I added this page (link to large file) into Bookmarks Bar and that’s enough.
Its start to download file into RAM every time Opera starts, after every crash.
As the solution its NOT enough to remove that bookmark, its necessary to also clear trash.
That’s it 😉