[racket] errors from raco setup while installing github Racket

Update: I deleted ~/Library/Racket, which cleared these particular issues, but now `make` dies later, mysteriously:

raco setup: --- checking package dependencies ---
car: contract violation
  expected: pair?
  given: '()
  context...:
   /Users/MB/git/racket/racket/collects/setup/private/pkg-deps.rkt:283:2: check-mod!
   /Users/MB/git/racket/racket/collects/setup/private/pkg-deps.rkt:354:10: for-loop
   /Users/MB/git/racket/racket/collects/setup/private/pkg-deps.rkt:354:10: for-loop
   /Users/MB/git/racket/racket/collects/setup/private/pkg-deps.rkt:349:6: loop
   /Users/MB/git/racket/racket/collects/setup/private/pkg-deps.rkt:435:8: for-loop
   /Users/MB/git/racket/racket/collects/setup/private/pkg-deps.rkt:431:4: for-loop
   /Users/MB/git/racket/racket/collects/setup/private/pkg-deps.rkt:424:2: for-loop
   /Users/MB/git/racket/racket/collects/setup/private/pkg-deps.rkt:24:0: check-package-dependencies
   /Users/MB/git/racket/racket/collects/setup/setup-core.rkt:61:0: setup-core
   /Users/MB/git/racket/racket/collects/setup/setup-go.rkt: [running body]
   /Users/MB/git/racket/racket/collects/setup/main.rkt: [running body]



On Jul 2, 2014, at 5:02 PM, Matthew Butterick <mb at mbtype.com> wrote:

> I just brought my git build up to date with the last 6-8 wks of updates. When the installer reaches raco setup, I'm getting errors of this flavor, which I haven't seen before:
> 
>> raco setup: given collection path: "racket" refers to the same directory as another given collection path, "racket/pkgs/snip-pkgs/snip-lib/racket"
> 
>> raco setup: given collection path: "scribblings/main" refers to the same directory as another given collection path, "racket/pkgs/racket-pkgs/racket-index/scribblings/main"
> 
> 
> I tried deleting everything nonessential and doing `make` from scratch, but the errors persist.
> 
> Any theories?