The entire thing is two solid white lines on either side, which are pretty strong indicators that you shouldn't pass into that area in the first place, diagonal stripes or not.
The vehicle should have at the very least stopped short of the road obstruction. But we don't yet know what led up to being in that lane, I was hoping the article in the OP would have taken us through it. Instead I'm getting the feeling this was a catastrophic software failure. Without more transparency on the issue, despite what Tesla may prefer I don't think I have any choice but to feel uncomfortable.