detection fails on isw hardware

 Hey all -- I've got a user that is having an issue with dmraid, the
tool does seem to find the raid but is unable to create devnodes via
devmapper.  He's tried .rc16 as well as CVS HEAD.  The following is what
he sent me last:

see http://bugs.gentoo.org/show_bug.cgi?id=307439  for the full
dialogue..  any help would be appreciated.

------- Comment #10 from [email protected]  2010-07-27 20:27 0000 -------
Well, the [CVS HEAD dmraid package] compiles fine, but unfortunatly, does not work.

/dev/mapper is still empty.

dmraid -ay hangs for a while, and finally spits out:

Medusa mapper # dmraid -ay
RAID set "isw_dagchgecca_BootEnBackup" already active
RAID set "isw_dagchgecca_Data" already active
ERROR:  Unable to register a device mapper event handler for device
"isw_dagchgecca_BootEnBackup"
ERROR:  Unable to register a device mapper event handler for device
"isw_dagchgecca_Data"
ERROR: opening "/dev/mapper/isw_dagchgecca_BootEnBackup"
ERROR: opening "/dev/mapper/isw_dagchgecca_Data"

Output from 
"strace -f -s 1500 -t -o /tmp/strace dmraid -ay"
is found here:
http://sharesend.com/uuu3a

(bzip2'ed, 141MB unpacked, bugzilla has a limit of 1MB for uploaded files, this
is 2.3MB)

line 1002460 shows the error.
Just above (1002436) that you can see the child segfaulting after a munmap()
call.

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