When components/schema/<object> reference other objects, validate() was getting called on the referenced objects with no arguments. The return value was void, but checked as if it was a boolean value.
* test cpp pistache petstore in travis * make build_petstore executable * add submodule update init * use addExternalLibs option * update samples * update gcc version to 5 * fix addon, env * restore cargo path * trigger build failure, add cache * undo build failure change