Float32Array undefined when evaluated in vm.runInNewContext()

[jmm]

Can someone clue me in as to why Float32Array is undefined when referenced in a script executed by vm.runInNewContext()? I arrived here while debugging test failures after bumping the traceur version in es6ify.

Given the following:

• Node v0.10.32 on Ubuntu 12

• Float32Array.js:

  Float32Array;

• vm-Float32Array.js:

  var
    fs = require('fs'),
    vm = require('vm');
  
  vm.runInNewContext(
    fs.readFileSync('./Float32Array.js')
  );

node ./Float32Array.js is fine, but node ./vm-Float32Array.js results in:

/.../vm-Float32Array.js:5
vm.runInNewContext(
   ^
ReferenceError: Float32Array is not defined
    at evalmachine.<anonymous>:1:1
    at Object.<anonymous> (/.../vm-Float32Array.js:5:4)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Function.Module.runMain (module.js:497:10)
    at startup (node.js:119:16)
    at node.js:906:3

[cjihrig]

This doesn't appear to be an issue in the latest 0.12 code. For older versions, such as 0.10.32, you can try this:

require('vm').runInNewContext('new Float32Array()', {
  Float32Array: Float32Array
});

[jmm]

@cjihrig Thanks for the quick reply and suggestion. That gets the test passing again, so I think that's a viable solution for now.