On Mon, 13 Jul 2015 08:53:18 GMT, Taylor Gronka wrote:

On Mon, 13 Jul 2015 08:01:08 GMT, Sönke Ludwig wrote:

Creating closures can sometimes indeed be tricky when nested scopes are involved, but I have troubles reproducing the errors above. What I have is this: http://dpaste.dzfl.pl/0804d5dbb52f

Is there anything structurally different from what you had?

I adapted your code snippet into a simple vibe project called test:
dub init test vibe.d

In dub.json, seems to be using vibe-d 0.7.19

Here is app.d
https://gist.github.com/gronka/f16b52641de6e481caba

I'm getting the same error when I try to compile 

source/app.d(35): Error: need 'this' for 'm_pass' of type 'RequestPass'

Interesting, seems like this may be a compiler bug where it tries to create a function instead of a delegate. When using any explicit "delegate" syntax, it suddenly works: 

HTTPServerRequestDelegate del = (req, res) => doRegister(req, res, m_pass);
router.get("/register", del);
router.get("/register", delegate (req, res) { doRegister(req, res, m_pass); });

Maybe partial is the nicer syntax alternative, though.

Reduced case: http://dpaste.dzfl.pl/3d196916b8e3

Swapping the order of the two get overloads also fixes the issue. I'll search the D bug tracker for an existing bug report later.