T10929.hs:4:6: warning: [-Wempty-enumerations (in -Wdefault)]
    Enumeration is empty

T10929.hs:22:6: warning: [-Wempty-enumerations (in -Wdefault)]
    Enumeration is empty

T10929.hs:28:6: warning: [-Wempty-enumerations (in -Wdefault)]
    Enumeration is empty