In Qt Creator to create project, there are some components generated. A, these components do not include any interface, write the main function test without any problem, now I'd like to have these components and the UI interface, in the main project to create the UI, inherit the MainWindow, firing a project is added to the UI project, use to create the default UI project code, without adding any other code, including the sub-project of the call API, also add the LIBS and INCLUDEPATH pro file, compile ok, runtime, Qt abnormal end, the Debug an error in the MainWindow show function, the stack is finally find the error information from the/usr/lib/x86_64 - - the gnu/Linux libLLVM - 9. So. 1,

Currently unable to post debugging stack source code, or information,,

The remote access server, through the X11 forwarding data display interface

OS: Ubuntu 18.04
Qt VERSION: 5.9.5
Qmake VERSION: 3.1