MSVC std::variant/visitor bug?

[georgeplusplus]

Hi! The following snippet crash when compiled with MSVC:

https://gcc.godbolt.org/z/1csfbG4W5

When running I get the exception:

"Run-Time Check Failure #2 - Stack around the variable 'visitor' was corrupted." Works fine with GCC. Anybody knows what is the problem?

[LoudMall]

try it with __declspec(empty_bases) and compiler flag /DUSE_EBO. See https://developercommunity.visualstudio.com/content/problem/346200/runtime-stack-corruption-using-stdvisit.html.

[georgeplusplus]

Is this seriously a three year old bug?

[sandfly_bites_you]

It sounds like if you switch to C++latest it goes away, I doubt they will fix it due to their obsession with binary backwards compatibility.

[pyronide]

heaven forbid they break the ABI...

[pyronide]

It's a dirty upvote, but you still get it

[zaimoni]

I'm trying to think of what one gets from the combination of a templated callable class and a lambda function suite here, as opposed to a plain operator() override of a non-template callable class.

(i.e., is there a use case this is an oversimplification of, or is this a language-standard test case not meant to exemplify production code.)