Wrong internal dependency tree for beta versions

[Aprillion]

Version

4.0.0-beta.7 (or any 4.x version lower than the current @next)

Steps to reproduce

1. in package.json of an actual project, use an exact-version dependency, e.g. "react-router-dom": "4.0.0-beta.7"
2. wait until a newer version is released, beta.8, before installing (e.g. when continuous integration runs npm install without recycling node_modules)
3. run npm install

Expected Behavior

├─┬ [email protected] 
│ ├─┬ ...
│ └── [email protected]

No runtime errors.

Actual Behavior

Wrong dependency to beta.8:

├─┬ [email protected] 
│ ├─┬ [email protected] 
│ │ ├── [email protected] 
│ │ ├── [email protected] 
│ │ └── [email protected] 
│ └── [email protected] 

Random runtime errors, nothing is rendered, e.g.:

Uncaught TypeError: Cannot read property 'path' of undefined
    at Switch.js:53
    at forEachSingleChild (ReactChildren.js:51)
    at traverseAllChildrenImpl (traverseAllChildren.js:77)
    at traverseAllChildrenImpl (traverseAllChildren.js:93)
    at traverseAllChildren (traverseAllChildren.js:172)
    at Object.forEachChildren [as forEach] (ReactChildren.js:71)
    at Switch.render (Switch.js:51)
    at ReactCompositeComponent.js:796
    at measureLifeCyclePerf (ReactCompositeComponent.js:75)
    at ReactCompositeComponentWrapper._renderValidatedComponentWithoutOwnerOrContext (ReactCompositeComponent.js:795)

[Aprillion]

workaround:

  "dependencies": {
    "react-router": "4.0.0-beta.7",
    "react-router-dom": "4.0.0-beta.7",
  },

will install correctly:

├─┬ [email protected] 
│ ├─┬ [email protected] 
│ │ ├── [email protected] 
│ │ └── [email protected] 
│ └── [email protected] 
├── [email protected] 

[timdorr]

Dupe of #4656