https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65608 Bug 65608 depends on bug 51757, which changed state.
Bug 51757 Summary: friend defined inside class and declared inside main linker error https://gcc.gnu.org/bugzilla/show_bug.cgi?id=51757 What |Removed |Added ---------------------------------------------------------------------------- Status|REOPENED |RESOLVED Resolution|--- |FIXED
