Sure, I had the word "trivial" in quotes for that reason. I meant that if you're able to generate a collision, the rest of this doesn't follow (from the article)

> Even if creating a collision were feasible for an attacker, Bjarmason pointed out, that is only the first step in the development of a successful attack. Finding a collision of any type is hard; finding one that is still working code, that has the functionality the attacker is after, and that looks reasonable to both humans and compilers is quite a bit harder — if it is possible at all.