In types.js there are a multiple helper functions added to Array that do not properly check that the array argument being passed to them is actually an array. This can lead to a stall in the shell if an object with property length set to a large number (or Infinity) is passed as an argument to one of these functions.

Affected functions:

• Array.contains
• Array.unique
• Array.shuffle
• Array.tojson
• Array.fetchRefs
• Array.sum
• Array.stdDev

This is causing issues in jstestfuzz.