\[\left(\left(x \cdot y + z \cdot t\right) + a \cdot b\right) + c \cdot i\]

\left(\left(x \cdot y + z \cdot t\right) + a \cdot b\right) + c \cdot i

double f(double x, double y, double z, double t, double a, double b, double c, double i) {
        double r8251 = x;
        double r8252 = y;
        double r8253 = r8251 * r8252;
        double r8254 = z;
        double r8255 = t;
        double r8256 = r8254 * r8255;
        double r8257 = r8253 + r8256;
        double r8258 = a;
        double r8259 = b;
        double r8260 = r8258 * r8259;
        double r8261 = r8257 + r8260;
        double r8262 = c;
        double r8263 = i;
        double r8264 = r8262 * r8263;
        double r8265 = r8261 + r8264;
        return r8265;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019179 
(FPCore (x y z t a b c i)
  :name "Linear.V4:$cdot from linear-1.19.1.3, C"
  (+ (+ (+ (* x y) (* z t)) (* a b)) (* c i)))

Backtrace

result arity mismatch; expected number of values not received expected: 2 received: 1 in: local-binding form values...: 0		L	C
loop	/data/pavpan/nightlies/herbie/various-cleanup/src/core/extraction.rkt	25	2
(unnamed)	/data/pavpan/nightlies/herbie/various-cleanup/src/core/simplify.rkt	26	0
simplify!	/data/pavpan/nightlies/herbie/various-cleanup/src/mainloop.rkt	217	0
run-improve43	/data/pavpan/nightlies/herbie/various-cleanup/src/mainloop.rkt	339	0
(unnamed)	/opt/racket-7.0/collects/racket/private/more-scheme.rkt	261	28
run	/opt/racket-7.0/share/pkgs/profile-lib/main.rkt	39	2
profile-thunk16	/opt/racket-7.0/share/pkgs/profile-lib/main.rkt	9	0
(unnamed)	/opt/racket-7.0/collects/racket/private/more-scheme.rkt	261	28