Wrong location is reported when `getproperty` is defined by the user

[EdsterG]

When getproperty is overridden by the user, field errors point to the wrong location. Here's a minimal example:

struct Test
    x::Int
end

function Base.getproperty(o::Test, s::Symbol)
    if s === :y
        return getfield(o, :x)
    else
        return getfield(o, s)                  # FieldError for `z` points to this line
    end
end

function test(x::Test)
    x.z                                        # I'd expect the field error to point here
end