render-warnings: contract violation
  expected: a list of 5 elements
  given: 4 elements
  complete list: '("ground-truth" "Could not converge on a ground truth" #f ("w = -2.3056623001526335e+200" "l = -2.633413674641751e+41"))
  in: an element of
      the 1st argument of
      (->
       (listof
        (list/c
         symbol?
         string?
         (listof any/c)
         (or/c string? #f)
         (listof string?)))
       xexpr?)
  contract from: (function render-warnings)
  blaming: /herbie/reports/common.rkt
   (assuming the contract is correct)
  at: /herbie/reports/common.rkt:100:18
  context...:
   /usr/share/racket/collects/racket/contract/private/blame.rkt:346:0: raise-blame-error
   /usr/share/racket/collects/racket/contract/private/list.rkt:215:14
   /usr/share/racket/collects/racket/contract/private/arrow-higher-order.rkt:379:33
   /home/nightlies/herbie/main/src/reports/make-graph.rkt:30:0: make-graph
   /home/nightlies/herbie/main/src/reports/pages.rkt:34:0: make-page
   /home/nightlies/herbie/main/src/api/run.rkt:67:0: generate-bench-report
   /home/nightlies/herbie/main/src/api/run.rkt:83:0: run-tests
   body of (submod "/home/nightlies/herbie/main/src/main.rkt" main)