Carrier names containing semicolons not parsed correctly

[t0mpr1c3]

e.g. the following gives no output

;!knitout-2
;;Carriers: 1 2 ; 4 5
in ;
tuck - f4 ;
tuck - f2 ;
tuck - f0 ;
tuck + f1 ;
tuck + f3 ;
tuck + f5 ;