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

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

name in Component.childContextTypes,
          '%s.getChildContext(): key "%s" is not defined in childContextTypes.',
          this.getName() || 'ReactCompositeComponent',
          name
        );
      }
      return Object.assign({}, currentContext, childContext);
    }
    return currentContext;
  },
  /**
   * Assert that the context types are valid
   *
   * @param {object} typeSpecs Map of context field to a ReactPropType
   * @param {object} values Runtime values that need to be type-checked
   * @param {string} location e.g. "prop", "context", "child context"
   * @private
   */
  _checkContextTypes: function(typeSpecs, values, location) {
    checkReactTypeSpec(
      typeSpecs,
      values,
      location,
      this.getName(),
      null,
      this._debugID
    );
  },
  receiveComponent: function(nextElement, transaction, nextContext) {
    var prevElement = this._currentElement;