msvc compile error C7631 about parameter HOT 8 OPEN

Boost is compiled with b2.exe cxxstd=20 link=shared runtime-link=shared address-model=64 define=_WIN32_WINNT=0x0601

from parameter.

https://github.com/boostorg/parameter/blob/develop/include/boost/parameter/keyword.hpp#L716

    namespace                                                                \
    {                                                                        \
        ::boost::parameter::keyword<tag_namespace::name> const& name         \
            = ::boost::parameter::keyword<tag_namespace::name>::instance;    \
    }

Add static to this line can fix this issue.

from parameter.

This seems to be a compiler bug because severity is the variable definition, given that it has initializer.

Please report this to MSVC developers.

from parameter.

Already report here

from parameter.

I have tried to build the current develop with the command you provided (plus toolset=msvc-14.3) and couldn't reproduce the error.

Could you provide a reproducer?

from parameter.

Sorry, I can't. This problem only arises when the code is sufficiently complex. Our projects have lots of C++ 20 modules, *.ixx. I use Boost.Log in small project, it compiles.

from parameter.

As the previous thread was closed by Microsoft due to not enough input being provided by the author, I opened a new one with a small reproducer:

https://developercommunity.visualstudio.com/t/error-C7631:-when-instantiating-template/10476144

from parameter.

As the previous thread was closed by Microsoft due to not enough input being provided by the author, I opened a new one with a small reproducer:

https://developercommunity.visualstudio.com/t/error-C7631:-when-instantiating-template/10476144

Microsoft responded that this is not a compiler bug.

from parameter.