[CSS] Missing tokens on invalid input

[ris58h]

Input:

[f='] {}

Note that there is only one single quotation mark so the input is invalid.

Error:

line 1:3 token recognition error at: ''] {}\n'

Tokens:

[[@0,0:0='[',<10>,1:0], [@1,1:1='f',<61>,1:1], [@2,2:2='=',<11>,1:2], [@3,9:8='<EOF>',<-1>,2:0]]

Note that there are only 4 tokens [[, f, =, <EOF>] and there are no tokens from 3 to 8 offsets.