Exception for Lanczos kernel

Specification

\[\left(10^{-5} \leq x \land x \leq 1\right) \land \left(1 \leq tau \land tau \leq 5\right)\]

\[\begin{array}{l} \\ \begin{array}{l} t_1 := x \cdot \mathsf{PI}\left(\right)\\ t_2 := t\_1 \cdot tau\\ \frac{\sin t\_2}{t\_2} \cdot \frac{\sin t\_1}{t\_1} \end{array} \end{array} \]

(FPCore (x tau)
 :precision binary32
 (let* ((t_1 (* x (PI))) (t_2 (* t_1 tau)))
   (* (/ (sin t_2) t_2) (/ (sin t_1) t_1))))

\begin{array}{l}

\\
\begin{array}{l}
t_1 := x \cdot \mathsf{PI}\left(\right)\\
t_2 := t\_1 \cdot tau\\
\frac{\sin t\_2}{t\_2} \cdot \frac{\sin t\_1}{t\_1}
\end{array}
\end{array}

Reproduce

herbie shell --seed 2025019 
(FPCore (x tau)
  :name "Lanczos kernel"
  :precision binary32
  :pre (and (and (<= 1e-5 x) (<= x 1.0)) (and (<= 1.0 tau) (<= tau 5.0)))
  (* (/ (sin (* (* x (PI)) tau)) (* (* x (PI)) tau)) (/ (sin (* x (PI))) (* x (PI)))))

Please file a bug report with this information.

Backtrace

run-egg: unknown command `(proofs (.f32 (/.f32 (sin.f32 (.f32 (.f32 x (PI.f32)) tau)) (.f32 (.f32 x (PI.f32)) tau)) (/.f32 (sin.f32 (.f32 x (PI.f32))) (.f32 x (PI.f32)))) /.f32 (.f32 (/.f32 (sin.f32 (fma.f32 (.f32 tau (PI.f32)) x (PI.f32))) (.f32 (PI.f32) x)) (sin.f32 (fma.f32 (PI.f32) x (PI.f32)))) (.f32 tau (.f32 (PI.f32) x)))`		L	C
add-derivations-to	/home/nightlies/herbie/unbatch-derivations/src/core/derivations.rkt	20	0
loop	.../private/map.rkt	40	19
alt-map	/home/nightlies/herbie/unbatch-derivations/src/utils/alternative.rkt	44	0
loop	.../private/map.rkt	40	19
alt-map	/home/nightlies/herbie/unbatch-derivations/src/utils/alternative.rkt	44	0
loop	.../private/map.rkt	40	19
alt-map	/home/nightlies/herbie/unbatch-derivations/src/utils/alternative.rkt	44	0
add-derivations	/home/nightlies/herbie/unbatch-derivations/src/core/derivations.rkt	33	0
extract!	/home/nightlies/herbie/unbatch-derivations/src/core/mainloop.rkt	79	0
run-improve!	/home/nightlies/herbie/unbatch-derivations/src/core/mainloop.rkt	45	0
get-alternatives/report	/home/nightlies/herbie/unbatch-derivations/src/api/sandbox.rkt	174	0
(unnamed)	/home/nightlies/herbie/unbatch-derivations/src/api/sandbox.rkt	265	6
(unnamed)	/usr/share/racket/pkgs/profile-lib/main.rkt	40	10
profile-thunk	/usr/share/racket/pkgs/profile-lib/main.rkt	9	0
in-engine	/home/nightlies/herbie/unbatch-derivations/src/api/sandbox.rkt	283	2
(unnamed)	/usr/share/racket/collects/racket/engine.rkt	42	24