fsck reports bug while checking ext4 partition

[Kevin O'Gorman]

fsck on a broken ext4 partition reports

WARNING: PROGRAMMING BUG IN E2FSCK!
        OR SOME BONEHEAD (YOU) IS CHECKING A MOUNTED (LIVE) FILESYSTEM.

several times. And no, I'm not that boneheaded.

System: Natty
Package: e2fsprogs 1.41.14-1ubuntu3

I was running
   fsck -yf /dev/sdg1
and expected lots of errors being fixed, which I got,
BUT: I also got the above "programming bug" report a few times.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: e2fsprogs 1.41.14-1ubuntu3
ProcVersionSignature: Ubuntu 2.6.38-11.50-generic-pae 2.6.38.8
Uname: Linux 2.6.38-11-generic-pae i686
Architecture: i386
Date: Sat Oct 1 13:48:34 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: e2fsprogs
UpgradeStatus: No upgrade log present (probably fresh install)

[Theodore Ts'o (tytso)]

I've marked this bug as a duplicate of 864344; see there for my comments for why I believe it's caused by a hardware problem.