PyV8 crashes in some circumstances

```
I have a few reports about crashes of PyV8 on OSX in my Emmet plugin for
Sublime Text. The problem is that I’m on OSX too and I can’t reproduce this
bug (as well as thousands of other users).

I’ve attached a sample crash log.

Here are symptoms:
1. User starts editor
2. User tries to type something in editor. In this case, there might be
frequent access to JS context (to get a list of code completions)
3. App crashes

On step 2, the only thing I do is just an array population, which might be a
bit CPU intensive. No explicit GC invocation.

Do you have any idea what’s happening here?
```

Original issue reported on code.google.com by `serge....@gmail.com` on 11 Mar 2013 at 1:08

Attachments:
- [Sublime Text 2_2013-03-11-092254_Andres-MacBook-Air.crash](https://storage.googleapis.com/google-code-attachments/pyv8/issue-166/comment-0/Sublime Text 2_2013-03-11-092254_Andres-MacBook-Air.crash)

Start by examining the attached OSX crash log and the reported sequence of accessing the JavaScript context while populating an array. Compare those details with PyV8's relevant runtime behavior; done means the crash has a documented cause and a verified resolution.

Written by the indexing model from the issue text.