Assertion failed: px != 0

Assertion failed: px != 0, file C:\Program Files\PCL 1.10.1\3rdParty\Boost\include\boost-1_72\boost/smart_ptr/shared_ptr.hpp, line 734
错误原因：智能指针未初始化。

pcl::visualization::PCLVisualizer::Ptr viewer1;			//未初始化
//初始化智能指针：
pcl::visualization::PCLVisualizer::Ptr viewer1(new pcl::visualization::PCLVisualizer("3D Viewer"));