https://github.com/mozilla/pdf.js/issues/6397#issuecomment-164954332 Would have been a lot easier to find had there been an assertion checking that string16 didn't go out of bounds of the 16bit number.

import { decodeFontData, ttx, verifyTtxOutput } from "./fontutils.js";
import { CMapFactory } from "../../src/core/cmap.js";
import { Font } from "../../src/core/fonts.js";