**Do you want to request a *feature* or report a *bug*?**
BUG

**What is the current behavior?**
App doesn't render in IE11 and below.

**If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem via https://jsfiddle.net or similar (template: https://jsfiddle.net/reactjs/69z2wepo/).**
- Build React app with Webpack
- Launch IE11 or below (not an emulator)
- You will see a blank screen or half-compiled React app with the following error:
![24f8f6e8-afde-11e6-9a6f-a3cc6355f55c](https://cloud.githubusercontent.com/assets/1647596/20527736/7b9075a8-b097-11e6-8ccb-d205b1908f31.png)

**What is the expected behavior?**
- To render as it does in Chrome, Firefox, etc.

**Which versions of React, and which browser / OS are affected by this issue? Did this work in previous versions of React?**
We've temporarily shrink-wrapped our dependencies so that we can continue to serve our app. We're starting to believe that it's coming from a dependency that `react`, `apollo`  or `webpack` may be relying on...

Shrink-wrapped versions of our dependencies (left is the new one that's broken and the right one is the old one that continues to work across all browsers) https://www.diffchecker.com/SyaJUcsk
this.previousWasTextNode = false;
    this.makeStaticMarkup = makeStaticMarkup;
  }
  read(bytes: number): string | null {
    if (this.exhausted) {
      return null;
    }
    var out = '';
    while (out.length < bytes) {
      if (this.stack.length === 0) {
        this.exhausted = true;
        break;
      }
      var frame: Frame = this.stack[this.stack.length - 1];
      if (frame.childIndex >= frame.children.length) {
        var footer = frame.footer;
        out += footer;
        if (footer !== '') {
          this.previousWasTextNode = false;
        }
        this.stack.pop();
        if (frame.tag === 'select') {
          this.currentSelectValue = null;
        }
        continue;
      }
      var child = frame.children[frame.childIndex++];
      if (__DEV__) {
        setCurrentDebugStack(this.stack);
      }