TypedArrays incorrectly write to "NaN" properties

[gibson042]

Environment: XS 11.6.0 32 4

Description
XS incorrectly honors writes to a typed array property named "NaN".

Steps to Reproduce

const arr = new Int8Array();
Reflect.set(arr, NaN, 42); // => true
arr.NaN; // => 42

Expected behavior
Per Integer-Indexed Exotic Objects [[Set]] (and related internal methods), any string-valued property recognized as a canonical numeric string by CanonicalNumericIndexString should be subject to special treatment that includes silent failure when the property name is out of bounds or non-integer. Above, Reflect.set correctly returns true but the subsequent read should return undefined.