env and @headers not available in before block when Method not allowed

[leifg]

Suppose you do this:

before do
  env['Something']
end

In general this is possible.

However if you run into a method not allowed, not only will this block executed, it also sets env (and @headers) to nil and throws an error that is never caught and will expose the stacktrace to the caller.

I created an example project here.

[leifg]

Note: this runs the before filters in the Method not allowed context. I guess at this point env and @headers also should be initialized like it is done in the endpoint

[dblock]

This looks legit, I would turn your demo into a spec and PR a fix. Thanks.

[leifg]

opened the PR: #1446