Issue1109-1.agda:12,17-26
Could not parse the application x ○ x ● x
Operators used in the grammar:
  ● (infix operator, level 20) [_●_ (Issue1109-1.agda:5,3-6)]
  ○ (infix notation, level 20) [f (Issue1109-1.agda:4,3-4)]  
when scope checking x ○ x ● x
