Error in 96.0ms

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019089 +o rules:numerics
(FPCore (alpha beta)
  :name "Octave 3.8, jcobi/1"
  :pre (and (>.p16 alpha (real->posit16 -1)) (>.p16 beta (real->posit16 -1)))
  (/.p16 (+.p16 (/.p16 (-.p16 beta alpha) (+.p16 (+.p16 alpha beta) (real->posit16 2.0))) (real->posit16 1.0)) (real->posit16 2.0)))

Backtrace

dynamic-require: name is not provided name: 'posit16-nar module: #<resolved-module-path:"/home/p92/.racket/7.0/pkgs/softposit-rkt/main.rkt">LC
get-sym/opt/racket-7.0/collects/racket/lazy-require.rkt8913
(unnamed)/opt/racket-7.0/collects/racket/promise.rkt7415
call-with-exception-handler/opt/racket-7.0/collects/racket/private/more-scheme.rkt2652
(unnamed)/opt/racket-7.0/collects/racket/promise.rkt422
(unnamed)/opt/racket-7.0/collects/racket/lazy-require.rkt1066
ordinary-value?/data/pavpan/nightlies/herbie/develop/src/common.rkt810
filter-p&e/data/pavpan/nightlies/herbie/develop/src/points.rkt2810
loop/data/pavpan/nightlies/herbie/develop/src/points.rkt3132
setup-prog!34/data/pavpan/nightlies/herbie/develop/src/mainloop.rkt630
run-improve43/data/pavpan/nightlies/herbie/develop/src/mainloop.rkt3460
(unnamed)/opt/racket-7.0/collects/racket/private/more-scheme.rkt26128
run/opt/racket-7.0/share/pkgs/profile-lib/main.rkt392
profile-thunk16/opt/racket-7.0/share/pkgs/profile-lib/main.rkt90
(unnamed)/opt/racket-7.0/collects/racket/private/more-scheme.rkt26128