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.

if (Number.isInteger(level)) {
    verbosity = level;
  }
}
function getVerbosityLevel() {
  return verbosity;
}
function info(msg) {
  if (verbosity >= VerbosityLevel.INFOS) {
    console.log(`Info: ${msg}`);
  }
}
function warn(msg) {