?

\[\left(5 \leq a \land a \leq 10\right) \land \left(0 \leq b \land b \leq 0.001\right)\]
\[\left(a + b\right) \cdot \left(a + b\right) \]
(FPCore (a b) :precision binary64 (* (+ a b) (+ a b)))
double code(double a, double b) {
	return (a + b) * (a + b);
}
real(8) function code(a, b)
    real(8), intent (in) :: a
    real(8), intent (in) :: b
    code = (a + b) * (a + b)
end function
public static double code(double a, double b) {
	return (a + b) * (a + b);
}
def code(a, b):
	return (a + b) * (a + b)
function code(a, b)
	return Float64(Float64(a + b) * Float64(a + b))
end
function tmp = code(a, b)
	tmp = (a + b) * (a + b);
end
code[a_, b_] := N[(N[(a + b), $MachinePrecision] * N[(a + b), $MachinePrecision]), $MachinePrecision]
\left(a + b\right) \cdot \left(a + b\right)

Reproduce?

Please include this information when filing a bug report:

herbie shell --seed 2023096 
(FPCore (a b)
  :name "Expression 4, p15"
  :precision binary64
  :pre (and (and (<= 5.0 a) (<= a 10.0)) (and (<= 0.0 b) (<= b 0.001)))

  :herbie-target
  (+ (+ (+ (* b a) (* b b)) (* b a)) (* a a))

  (* (+ a b) (+ a b)))

Backtrace

match-define: no matching clause for '((x +.f64 (*.f64 a (+.f64 a b)) (*.f64 b (+.f64 a b))))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