On Tue, Jun 29, 2021 at 8:39 AM Oleg Smolsky <osmolsky@xxxxxxxxxxxx> wrote: > I am using `g++` to link in both working and failing cases. > The peculiar thing is that the linking issue goes away when I change the reproducer slightly: avoid linking the gcc10-built lib or avoid using std::unordered_map. Either thing is OK by itself...