[BUG] git-log shows first parent and repeated last for octopus merge

When trying to find how many merges and how many octopus merges (merges with more than two parents) are in git.git repository I have encountered the following strange output of git-log:

 1000:jnareb@roke:~/git> git log --parents --full-history --max-count=1 \
   211232bae64bcc60bbf5d1b5e5b2344c22ed767e -- a//b
 commit 211232bae64bcc60bbf5d1b5e5b2344c22ed767e <last parent repeated>
 Merge: d0d0d0b... d0d0d0b... d0d0d0b... d0d0d0b... d0d0d0b...
 [...]

while git-show gives correct output

 1005:jnareb@roke:~/git> git show 211232bae64bcc60bbf5d1b5e5b2344c22ed767e
 commit 211232bae64bcc60bbf5d1b5e5b2344c22ed767e
 Merge: fc54a9c... 9e30dd7... c4b83e6... 6602659... b28858b...
 [...]

Same with git-rev-list, also shows correct output:

 1005:jnareb@roke:~/git> git rev-list --header --parents --max-count=1 \
   211232bae64bcc60bbf5d1b5e5b2344c22ed767e
 211232bae64bcc60bbf5d1b5e5b2344c22ed767e [...] 
 tree cdafa88fa4ed7fcc7bb6c64d62e2d7c4d3b65e42
 parent fc54a9c30ccad3fde5890d2c0ca2e2acc0848fbc
 parent 9e30dd7c0ecc9f10372f31539d0122db97418353
 parent c4b83e618f1df7d8ecc9392fa40e5bebccbe6b5a
 parent 660265909fc178581ef327076716dfd3550e6e7b
 parent b28858bf65d4fd6d8bb070865518ec43817fe7f3
 [...]

1008:jnareb@roke:~/git> git --version git version 1.4.2.1