That's a good idea, but you shouldn't assume too much about why people are making mistakes, I've been working with and on Twisted since 2001, so not a JS kiddy

That's a good idea, but you shouldn't assume too much about why people are making mistakes, I've been working with and on Twisted since 2001, so not a JS kiddy :) I made this mistake fair and square even though I knew better. Which is why I like having a tool that'll catch it for me. My typical approach is `lambda x, y=y: f(x, y)`. Inline functions are much more readable, is the thing. But I can see the argument for this coding style, yes.