?

\[\log x - \log \log x \]
(FPCore (x) :precision binary64 (- (log x) (log (log x))))
double code(double x) {
	return log(x) - log(log(x));
}
real(8) function code(x)
    real(8), intent (in) :: x
    code = log(x) - log(log(x))
end function
public static double code(double x) {
	return Math.log(x) - Math.log(Math.log(x));
}
def code(x):
	return math.log(x) - math.log(math.log(x))
function code(x)
	return Float64(log(x) - log(log(x)))
end
function tmp = code(x)
	tmp = log(x) - log(log(x));
end
code[x_] := N[(N[Log[x], $MachinePrecision] - N[Log[N[Log[x], $MachinePrecision]], $MachinePrecision]), $MachinePrecision]
\log x - \log \log x

Reproduce?

Please include this information when filing a bug report:

herbie shell --seed 2023094 
(FPCore (x)
  :name "Jmat.Real.lambertw, estimator"
  :precision binary64
  (- (log x) (log (log x))))

Backtrace

match-define: no matching clause for '((x +.f64 (log.f64 x) (neg.f64 (log.f64 (log.f64 x)))))LC
program-body/home/nightlies/herbie/remove-change/src/programs.rkt210
(unnamed)/usr/share/racket/collects/racket/contract/private/arrow-higher-order.rkt37933
gen-rewrites!/home/nightlies/herbie/remove-change/src/patch.rkt1450
patch-table-run/home/nightlies/herbie/remove-change/src/patch.rkt2960
(unnamed)/usr/share/racket/collects/racket/contract/private/arrow-val-first.rkt48618
run-iter!/home/nightlies/herbie/remove-change/src/mainloop.rkt2670
mutate!/home/nightlies/herbie/remove-change/src/mainloop.rkt3770
run-improve!/home/nightlies/herbie/remove-change/src/mainloop.rkt3250
run-herbie/home/nightlies/herbie/remove-change/src/sandbox.rkt570
(unnamed)/home/nightlies/herbie/remove-change/src/sandbox.rkt1336
(unnamed)/usr/share/racket/pkgs/profile-lib/main.rkt4010
profile-thunk/usr/share/racket/pkgs/profile-lib/main.rkt90
(unnamed)/usr/share/racket/collects/racket/engine.rkt4224