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Error when passing ErrorStackParser.parse as callback to Array.prototype.map #41

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@tao-cumplido

Description

@tao-cumplido
Issue body actions

I have an array of errors which I want to convert with error-stack-parser.
What I did was basically this:

errors.map(ErrorStackParser.parse).forEach(console.log)

Expected Behavior

I expected to get an array of StackFrames for each error.

Current Behavior

TypeError: Cannot read property 'parseV8OrIE' of undefined
    at ErrorStackParser$$parse (error-stack-parser.js:31:29)
    at Array.map (<anonymous>)
    at Object.<anonymous> (test.js:17:8)
    at Module._compile (module.js:635:30)
    at Object.Module._extensions..js (module.js:646:10)
    at Module.load (module.js:554:32)
    at tryModuleLoad (module.js:497:12)
    at Function.Module._load (module.js:489:3)
    at Function.Module.runMain (module.js:676:10)
    at startup (bootstrap_node.js:187:16)

Steps to Reproduce (for bugs)

const ErrorStackParser = require('error-stack-parser');
const errors = [new Error()];
errors.map(ErrorStackParser.parse).forEach(console.log);

This works:

errors.forEach((error) => console.log(ErrorStackParser.parse(error)))

And surprisingly this works too:

errors.map((error) => ErrorStackParser.parse(error)).forEach(console.log)

Your Environment

error-stack-parser 2.0.1
Node.js 8.9.0
Windows 10

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