
#109028 caused `sizeof` to be sometimes applied to function reference types, which makes a program ill-formed. This PR handles reference types by specializations to prevent such bogus `sizeof` expression to be instantiated. Fixes #142118.
#109028 caused `sizeof` to be sometimes applied to function reference types, which makes a program ill-formed. This PR handles reference types by specializations to prevent such bogus `sizeof` expression to be instantiated. Fixes #142118.