Cannot parse range sets

[m7stock]

The following cron times cannot be parsed although they are valid.

20 8,15 * * 0-1,3-6
0 7 * * 0-3,5-6
55,25 2-21,23 * * 0,1,3,5,6
55,25 2-7,10-21,23 * * 2,4

[rogerhelliwell]

Confirmed that day ranges are not supported. ie:

0 7 * * 1-4,6,7