Possible bug-no estimate if -a1 and -r

[Kgx Pnqvhm]

At the risk of having the moderators get after me for cross-posting, I'm asking here about a possible bug I mentioned in another thread.

Running hashcat-cli64.exe v0.41 using the Cain word list on some hashes with the -a 1 Combinator attack shows an estimated time after 0.03% upon reaching 0.04%:


Input.Mode: Dict (..\dicts\CainWordlist.txt)
Index.....: 1/1 (segment), 306706 (words), 3456292 (bytes)
Recovered.: 0/59 hashes, 0/50 salts
Speed/sec.: 34.95M plains, - words
Progress..: 96/306706 (0.03%)
Running...: 00:00:00:44
Estimated.: --:--:--:--

Input.Mode: Dict (..\dicts\CainWordlist.txt)
Index.....: 1/1 (segment), 306706 (words), 3456292 (bytes)
Recovered.: 0/59 hashes, 0/50 salts
Speed/sec.: 34.99M plains, 2 words
Progress..: 121/306706 (0.04%)
Running...: 00:00:00:56
Estimated.: 01:18:34:52

But if I have a rule via -r, (along with the -a 1), then even as of 0.05% it does not show an Estimated time. The AsIs.rule is simply ":".

Added rules from file AsIs.rule: 1

Input.Mode: Dict (..\dicts\CainWordlist.txt)
Index.....: 1/1 (segment), 306706 (words), 3456292 (bytes)
Recovered.: 0/59 hashes, 0/50 salts
Speed/sec.: 35.35M plains, - words
Progress..: 112/306706 (0.04%)
Running...: 00:00:03:26
Estimated.: --:--:--:--

Input.Mode: Dict (..\dicts\CainWordlist.txt)
Index.....: 1/1 (segment), 306706 (words), 3456292 (bytes)
Recovered.: 0/59 hashes, 0/50 salts
Speed/sec.: 35.36M plains, - words
Progress..: 144/306706 (0.05%)
Running...: 00:00:04:13
Estimated.: --:--:--:--

Is this a bug?