v1.11: Cannot shadow exports with a hand-typed function definition

[mbauman]

In v1.10, I could write a function definition that shadows a Base name:

▶ julia +1.10 -q
julia> sin() = 2
sin (generic function with 1 method)

julia> sin()
2

In v1.11, however, I cannot if I manually type this in:

▶ julia +1.11 -q
julia> sin() = 2
ERROR: invalid method definition in Main: function Base.sin must be explicitly imported to be extended

If, however, I paste sin() = 2 at the REPL or use history navigation to get to it, then I can do this. I assume it's a problem with tab completion.

Binding resolution all changed on v1.12+, of course, so I'm not sure if the fundamental issue here was resolved or if we're just happily rebinding things... but it seems like manually typing this doesn't change the partition_kind at least.

[nsajko]

Workaround:

julia> Base.active_repl.options.hint_tab_completes = false
false
 
julia> sin() = 3
sin (generic function with 1 method)

[Keno]

This kind of issue is exactly what motivated the binding refactor. I don't know that there's really anything to do on older versions. Possibly we could figure out who's resolving the binding and gating it, but now sure it's worth it.