This is a reproduction case for a bug described in this issue:

https://developercommunity.visualstudio.com/t/ABI-compatibility-issues-for-std::string/10199519

The problem is that VC++ libraries built in GitHub actions with VC++ toolset 14.33 generate code that does not interact properly with applications built with VC++ toolset 14.34 in that libraries construct std::string instances that are not null-terminated.

The intent for this repository is to build a library on a GitHub runner and link it against an application built with the current version of VC++.

NOTE: GitHub updated its runners with VC++ toolset 14.34, so this issue is no longer reproducible, as described.