An ObjC error leaks into the JS evaluation space if we evaluate the well-formed expression:
document.windows[0].selection.tasks.map(
x => x.totalCost
);
Cannot convert "0", type 13 to an NSAppleEventDescriptor
This is a fairly minor error for most practical purposes, as x.totalCost.toString() works fine, but it does suggest some misalignment of types, or a leaky wrapper, at that point.
