It's obvious that error context is vitally needed. What's not obvious is how to accomplish this in the language without compromising other things such as simpli

It's obvious that error context is vitally needed. What's not obvious is how to accomplish this in the language without compromising other things such as simplicity. Pick any solution, and a new set of problems rear their ugly heads. That's not to say it can't be solved. The proposal is open; neither rejected nor accepted. For especially difficult language design decisions, I like to work on other language changes that I am more confident about as a way to anchor the design, and then revisit the difficult questions, hopefully armed with more guidance from the rest of the language design being in place.