Incorrect font weight selected

[Yuri D'Elia]

Rebuilt today emacs on 36d873bf0d3f1185d0090e4b506a6a726476aec6, I
noticed when I start a fresh new instance of emacs the selected weight
for my default font is 'normal instead of 'medium.

I'm currently using Iosevka, which provides both regular and medium
weights, which I suspect interacts with the recent commit
1b2511fa2aed460120a36765ba16c14e355eef1d.

This is why I currently do in my init.el:

(set-face-attribute 'default nil :family "Iosevka"
                    :height 140 :weight 'medium)

If I re-evaluate this _after_ the frame has been created though, the
correct weight is selected.