\[\frac{\cosh x \cdot \frac{y}{x}}{z}\]
\frac{\cosh x \cdot \frac{y}{x}}{z}
double f(double x, double y, double z) {
        double r37587 = x;
        double r37588 = cosh(r37587);
        double r37589 = y;
        double r37590 = r37589 / r37587;
        double r37591 = r37588 * r37590;
        double r37592 = z;
        double r37593 = r37591 / r37592;
        return r37593;
}

Reproduce

Please include this information when filing a bug report:

herbie shell --seed 2019310 
(FPCore (x y z)
  :name "Linear.Quaternion:$ctan from linear-1.19.1.3"
  :precision binary64

  :herbie-target
  (if (< y -4.618902267687042e-52) (* (/ (/ y z) x) (cosh x)) (if (< y 1.03853053593515302e-39) (/ (/ (* (cosh x) y) x) z) (* (/ (/ y z) x) (cosh x))))

  (/ (* (cosh x) (/ y x)) z))

Backtrace

argmin: contract violation expected: (and/c list? (not/c empty?)) given: '() argument position: 2nd other arguments...: #<procedure:composed>LC
argmin/opt/racket-7.2/collects/racket/list.rkt7650
infer-splitpoints/data/pavpan/nightlies/herbie/fix-interface-bugs/src/core/regimes.rkt340
get-final-combination/data/pavpan/nightlies/herbie/fix-interface-bugs/src/mainloop.rkt3700
(unnamed)/opt/racket-7.2/collects/racket/private/more-scheme.rkt26128
run/opt/racket-7.2/share/pkgs/profile-lib/main.rkt392
profile-thunk16/opt/racket-7.2/share/pkgs/profile-lib/main.rkt90
(unnamed)/opt/racket-7.2/collects/racket/private/more-scheme.rkt26128