https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63243 Bug 63243 depends on bug 55641, which changed state.
Bug 55641 Summary: debug info for the type of a reference declared with a typedef has spurious 'const' https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55641 What |Removed |Added ---------------------------------------------------------------------------- Status|ASSIGNED |RESOLVED Resolution|--- |FIXED