https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83819 Bug 83819 depends on bug 90989, which changed state.
Bug 90989 Summary: [9 Regression] incorrrect strlen result after second strcpy into the same destination https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90989 What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution|--- |FIXED