Error in 16.4s

Runtime

Time bar (total: 16.4s)Debug logProfile

Please include this information when filing a bug report:

herbie shell --seed '#(1070258749 1877548225 2229079127 1588002776 3179087814 1886870650)' 
(FPCore (x y z t a b)
  :name "Numeric.SpecFunctions:incompleteBetaWorker from math-functions-0.1.5.2"
  (/ (* x (exp (- (+ (* y (log z)) (* (- t 1.0) (log a))) b))) y))

Backtrace

vector-ref: contract violation expected: exact-nonnegative-integer? given: 0.0 argument position: 2nd other arguments...: '#(0)LC
(unnamed)/data/pavpan/nightlies/herbie/develop/src/core/taylor.rkt2528
(unnamed)/data/pavpan/nightlies/herbie/develop/src/core/taylor.rkt4315
hash-ref!/usr/share/racket/collects/racket/private/more-scheme.rkt37313
(unnamed)/data/pavpan/nightlies/herbie/develop/src/core/taylor.rkt6415
hash-ref!/usr/share/racket/collects/racket/private/more-scheme.rkt37313
(unnamed)/data/pavpan/nightlies/herbie/develop/src/core/taylor.rkt6415
hash-ref!/usr/share/racket/collects/racket/private/more-scheme.rkt37313
loop/data/pavpan/nightlies/herbie/develop/src/core/taylor.rkt834
approximate9/data/pavpan/nightlies/herbie/develop/src/core/taylor.rkt120
(unnamed)/usr/share/racket/collects/racket/contract/private/arrow-higher-order.rkt34233
location-do/usr/share/racket/collects/racket/private/norm-define.rkt5383
location-do/usr/share/racket/collects/racket/private/norm-define.rkt5383
location-do/usr/share/racket/collects/racket/private/norm-define.rkt5383
(unnamed)/usr/share/racket/collects/racket/contract/private/arrow-higher-order.rkt34233
for-loop/data/pavpan/nightlies/herbie/develop/src/glue.rkt1412
taylor-alt/data/pavpan/nightlies/herbie/develop/src/glue.rkt1390
for-loop/data/pavpan/nightlies/herbie/develop/src/mainloop.rkt1357
gen-series!/data/pavpan/nightlies/herbie/develop/src/mainloop.rkt1290
run-iter!/data/pavpan/nightlies/herbie/develop/src/mainloop.rkt2150
for-loop/data/pavpan/nightlies/herbie/develop/src/mainloop.rkt24910
run-improve50/data/pavpan/nightlies/herbie/develop/src/mainloop.rkt2340
(unnamed)/usr/share/racket/collects/racket/private/more-scheme.rkt26128
run/usr/share/racket/pkgs/profile-lib/main.rkt392
profile-thunk16/usr/share/racket/pkgs/profile-lib/main.rkt90
(unnamed)/usr/share/racket/collects/racket/private/more-scheme.rkt26128