macro hygiene: Module name does not like being renamed

[Keno]

julia> macro foo()
       Expr(:toplevel, :(baremodule $(gensym()); end))
       end
@foo (macro with 2 methods)

julia> @foo()
ERROR: TypeError: in module, expected Symbol, got a value of type GlobalRef
Stacktrace:
 [1] top-level scope
   @ REPL[7]:1

[Keno]

While we're at it, using .$(GlobalRef(Foo, :Bar)) should probably also work.