Example: https://jsfiddle.net/gingur/u0h2rjae/1/

When generating **child context** with a stateless Component, the context is not available to the children.

ReactInstrumentation.debugTool.onEndLifeCycleTimer(
          this._debugID,
          'render'
        );
      }
    }
    if (__DEV__) {
      
      if (renderedComponent === undefined &&
          inst.render._isMockFunction) {
        
        
        renderedComponent = null;
      }
    }
    return renderedComponent;
  },
  /**
   * @private
   */
  _renderValidatedComponent: function() {
    var renderedComponent;
    if (__DEV__ || !(this._instance instanceof StatelessComponent)) {
      ReactCurrentOwner.current = this;
      try {
        renderedComponent =
          this._renderValidatedComponentWithoutOwnerOrContext();
      } finally {
        ReactCurrentOwner.current = null;
      }