Exception for Logistic function from Lakshay Garg

• unused variable y

Math

\[\frac{2}{1 + e^{-2 \cdot x}} - 1\]

C

double f(double x, double __attribute__((unused)) y) {
        double r8175 = 2.0;
        double r8176 = 1.0;
        double r8177 = -2.0;
        double r8178 = x;
        double r8179 = r8177 * r8178;
        double r8180 = exp(r8179);
        double r8181 = r8176 + r8180;
        double r8182 = r8175 / r8181;
        double r8183 = r8182 - r8176;
        return r8183;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019194 +o rules:numerics
(FPCore (x y)
  :name "Logistic function from Lakshay Garg"
  (- (/ 2.0 (+ 1.0 (exp (* -2.0 x)))) 1.0))

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	220	0
run-improve47	/data/pavpan/nightlies/herbie/various-cleanup/src/mainloop.rkt	342	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