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Segmentation fault when running the minimal.cpp example

4

I got the following error when running a basic `minimal.cpp`. ``` Thread 1 "Example" received signal SIGSEGV, Segmentation fault. 0x00007ffff6ae5d72 in QOpenGLContext::makeCurrent(QSurface*) () from /lib/x86_64-linux-gnu/libQt5Gui.so.5 (gdb) bt #0 0x00007ffff6ae5d72 in...

Segmentation fault when cpp function return type is std::optional<int>

3

Please check the follow module ```c++ #include "Rain.h" #include std::optional HowManyRain(int n) { if (n In [1]: import svar > In [2]: rain = svar.load("./lib/libRain.so") > In [3]: rain.HowManyRain(10) >...

fix #314 , compile error when used as shared library on windows with MSVC.