id,summary,reporter,owner,description,type,status,priority,milestone,component,resolution,keywords,cc,branch,branch_author,launchpad_bug
4022,twisted.web.http_headers.Headers allows itself to be constructed from strings instead of lists,exarkun,,"`Headers` is basically an abstraction around a dict mapping `str` to `list` of `str`.  So its initializer will accept such a dict.  However, it will also happily accept a dict mapping `str` to `str` and populate itself with garbage.  It should reject this case.
",enhancement,closed,low,,web,fixed,easy,rwall,,,