Slackware64-current Segmentation Fault in cryptsetup
Running "cryptsetup luksAddKey /dev/md2" encounters a segmentation fault after entering the passphrase that I want to add.
So, I grabbed the 1.0.6 source from a/cryptsetup, applied the use_udevadm patch, configured it and built it. Then I cd'd to src and ran ./cryptsetup. Everything worked fine. I did not have the time (at work) to play with the SlackBuild and track down the issue, but hope this helps.