Copied from internal bug system.

Bug overview description.
Visiting /post/create redirects with bad post id.

What part(s) of the site page(s) are affected?
/post/create

What is the expected behavior?
Redirect to a page without encoding random garbage into the url.

What actual behavior is given instead?
Redirect to /post/show with a stringified lambda as a post id. Which will never work.

Time of incident. (If applicable)
N/A

Can you reproduce the bug every time?
Yes.

What steps did you take to replicated this bug?
Visit /post/create with a non POST method.

Errors or other messages returned. (If any)
N/A

Confirmed, assigned internal ID #420.

Fixed, pending deploy.

This bug didn't make it into the deploy on August 2nd, 2016 because it had not been heavily tested. Waiting for next deploy.