- Electron version:
  1.3.3
- Operating system:
  OSX El Capitan 10.11.6

The following code crashes Electron. The dev tools don't open, but the HTML element highlights like it is open.

``` javascript
selfBrowserWindow.webContents.openDevTools({mode: 'detach'})
selfBrowserWindow.inspectElement(rightClickPosition.x, rightClickPosition.y)
```

The reason I'm doing this is because I want to open the dev tools detached, then inspect. Calling inspectElement first will open the dev tools docked by default.

atom/browser/api/atom_api_web_contents.cc
net::HttpResponseHeaders* headers) {
    base::DictionaryValue response_headers;
    if (headers) {
      size_t iter = 0;
      std::string key;
      std::string value;
      while (headers->EnumerateHeaderLines(&iter, &key, &value)) {
        key = base::ToLowerASCII(key);
        if (response_headers.HasKey(key)) {
          base::ListValue* values = nullptr;
          if (response_headers.GetList(key, &values))
            values->AppendString(value);
        } else {
          std::unique_ptr<base::ListValue> values(new base::ListValue());
          values->AppendString(value);
          response_headers.Set(key, std::move(values));
        }
      }
    }
    return ConvertToV8(isolate, response_headers);
  }
};
template<>
struct Converter<content::SavePageType> {
  static bool FromV8(v8::Isolate* isolate, v8::Local<v8::Value> val,