Overnigth jobs are failing: BUG: Attempt to do `checkout in Node ...

Job #189317157 failed for 9605f798:

[--:--:--][  ][main:core activity] BUG  BUG: Attempt to do `checkout in Node(value={'checkout': Node(value='True', file_index=6, line=35, column=16), 'url': Node(value='gnome:libglnx.git', file_index=6, line=36, column=11)}, file_index=6, line=35, column=6)` test