Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2020268 
(FPCore (t)
  :name "fma_test1"
  :precision binary64
  :pre (<= 0.9 t 1.1)

  :herbie-target
  (fma (+ 1.0 (* t 2e-16)) (+ 1.0 (* t 2e-16)) (- -1.0 (* 2.0 (* t 2e-16))))

  (+ (* (+ 1.0 (* t 2e-16)) (+ 1.0 (* t 2e-16))) (- -1.0 (* 2.0 (* t 2e-16)))))

Backtrace

repr-of: arity mismatch; the expected number of arguments does not match the given number expected: 3 given: 1 arguments...: '(/.f64 -4113761393303014933413986937889/102844034832575377634685573909834406561420991602098741459288064 (/.f64 1 t))		L	C
make-term	/data/pavpan/nightlies/herbie/egg-taylor/src/core/taylor.rkt	226	0
for-loop	/data/pavpan/nightlies/herbie/egg-taylor/src/core/taylor.rkt	47	2
build-terms	/data/pavpan/nightlies/herbie/egg-taylor/src/core/taylor.rkt	46	0
for-loop	/data/pavpan/nightlies/herbie/egg-taylor/src/core/taylor.rkt	78	4
terms-for-coeffs	/data/pavpan/nightlies/herbie/egg-taylor/src/core/taylor.rkt	76	2
approximate	/data/pavpan/nightlies/herbie/egg-taylor/src/core/taylor.rkt	51	0
location-do-multiple	/data/pavpan/nightlies/herbie/egg-taylor/src/programs.rkt	106	0
taylor-alt	/data/pavpan/nightlies/herbie/egg-taylor/src/mainloop.rkt	132	0
gen-series!	/data/pavpan/nightlies/herbie/egg-taylor/src/mainloop.rkt	167	0
run-iter!	/data/pavpan/nightlies/herbie/egg-taylor/src/mainloop.rkt	353	0
run-improve	/data/pavpan/nightlies/herbie/egg-taylor/src/mainloop.rkt	372	0
(unnamed)	/data/pavpan/nightlies/herbie/egg-taylor/src/sandbox.rkt	72	6
run	/opt/racket-7.8/share/pkgs/profile-lib/main.rkt	39	2
profile-thunk	/opt/racket-7.8/share/pkgs/profile-lib/main.rkt	9	0
(unnamed)	/opt/racket-7.8/collects/racket/engine.rkt	42	24

Reproduce

herbie shell --seed 2020268 
(FPCore (t)
  :name "fma_test1"
  :precision binary64
  :pre (<= 0.9 t 1.1)

  :herbie-target
  (fma (+ 1.0 (* t 2e-16)) (+ 1.0 (* t 2e-16)) (- -1.0 (* 2.0 (* t 2e-16))))

  (+ (* (+ 1.0 (* t 2e-16)) (+ 1.0 (* t 2e-16))) (- -1.0 (* 2.0 (* t 2e-16)))))