Exception for Ian Simplification

Specification

\[\begin{array}{l} \\ \frac{\mathsf{PI}\left(\right)}{2} - 2 \cdot \sin^{-1} \left(\sqrt{\frac{1 - x}{2}}\right) \end{array} \]

(FPCore (x)
 :precision binary64
 (- (/ (PI) 2.0) (* 2.0 (asin (sqrt (/ (- 1.0 x) 2.0))))))

\begin{array}{l}

\\
\frac{\mathsf{PI}\left(\right)}{2} - 2 \cdot \sin^{-1} \left(\sqrt{\frac{1 - x}{2}}\right)
\end{array}

Reproduce

herbie shell --seed 2025035 
(FPCore (x)
  :name "Ian Simplification"
  :precision binary64

  :alt
  (! :herbie-platform default (asin x))

  (- (/ (PI) 2.0) (* 2.0 (asin (sqrt (/ (- 1.0 x) 2.0))))))

Please file a bug report with this information.

Backtrace

operator-info: Unknown operator $literal		L	C
(unnamed)	/usr/share/racket/collects/racket/contract/private/arrow-higher-order.rkt	379	33
rebuild-enode	/home/nightlies/herbie/really-crazy-encodings/src/core/egg-herbie.rkt	585	0
split-untyped-eclasses	/home/nightlies/herbie/really-crazy-encodings/src/core/egg-herbie.rkt	630	0
make-typed-eclasses	/home/nightlies/herbie/really-crazy-encodings/src/core/egg-herbie.rkt	795	0
make-regraph	/home/nightlies/herbie/really-crazy-encodings/src/core/egg-herbie.rkt	842	0
egraph-best	/home/nightlies/herbie/really-crazy-encodings/src/core/egg-herbie.rkt	1392	0
simplify-batch	/home/nightlies/herbie/really-crazy-encodings/src/core/simplify.rkt	19	0
(unnamed)	/usr/share/racket/collects/racket/contract/private/arrow-val-first.rkt	486	18
initial-simplify	/home/nightlies/herbie/really-crazy-encodings/src/core/preprocess.rkt	54	0
find-preprocessing	/home/nightlies/herbie/really-crazy-encodings/src/core/preprocess.rkt	81	0
run-improve!	/home/nightlies/herbie/really-crazy-encodings/src/core/mainloop.rkt	45	0
get-alternatives/report	/home/nightlies/herbie/really-crazy-encodings/src/api/sandbox.rkt	174	0
(unnamed)	/home/nightlies/herbie/really-crazy-encodings/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/really-crazy-encodings/src/api/sandbox.rkt	283	2
(unnamed)	/usr/share/racket/collects/racket/engine.rkt	42	24