`QOpenGLContext::functions()`, the d-pointer is null (was QScopedPointer exception)

[271812697]

Please use the following template to help us solving your issue.

Issue Details

I build CGAL with Cmake,After building, all project concerning with Qt will appear exception,for example when i run AABB_demo, an exception occurs as follow

Picture

Environment

• Operating system (Windows/Mac/Linux, 32/64 bits):
• Compiler:
• Release or debug mode:
• Specific flags used (if any):
• CGAL version:
• Boost version:
• Other libraries versions if used (Eigen, TBB, etc.):

[lrineau]

Hi buranya (@271812697), from what I can see, and guess, from your issue report, the error is probably on your side. It seems you generated a Visual Studio project, using CMake, as it should be. Probably from CGAL-5.6.1, but I am not sure.

We need the following information, to help you:

Environment

• Operating system (Windows/Mac/Linux, 32/64 bits): It seems to be Windows. 32 or 64 bits?
• Compiler: probably Visual C++, right? Which version of Visual Studio, and which compiler toolkit?
• Release or debug mode: ?
• Specific flags used (if any): unless you specified additional flags yourself, forget this.
• CGAL version: CGAL-5.6.1, please confirm
• Boost version:
• Other libraries versions if used (Eigen, TBB, etc.): please tell us which Qt version

[271812697]

Thank you so much，I compile CGAL with following environment:

Environment

• Operation system(Windows,64 bits)
• Compiler:Visual C++,Visual Studio 2022
• Debug
• Specific flags used: use CMake GUI'default settings,with demo selected,with examples selected
• CGAL verison:CGAL-5.6.1
• Boost version:1.7.2
• Other libraries version:Qt 6.7.0

The projects concerning with Qt compile successfully,but will occur exception,the stack is as following:

[lrineau]

@CGAL/geometryfactory I see in the stack of the error that it is probably QOpenGLContext::functions() that is called on an QOpenGLContext that is not correctly initialized (because its d-pointer is null).

@271812697 It seems to be related to your OpenGL driver, and the way the CGAL application does not initialize the Qt6 OpenGL support correct. Do you have a way to tell us more about your OpenGL driver?

• What is the graphic card?
• What is the driver, and its version?
• And if you manage to know, the list of versions of OpenGL that the driver supports?

That would help us.

[lrineau]

@271812697 Thanks for the information. There is an issue, though: you mention that you are use CGAL-5.6.1, and Qt-6.7.0. However, CGAL-5.6.1 is not compatible with Qt6, but only with Qt5. Can you please verify?

[271812697]

Thank you so much,as you say, This exception is indeed caused by the incompatibility of the Qt version. When I changed the Qt version, the problem was solved!