Was running a repair with the following command and got this assertion error in the log of 2 out of 3 shards. The third shard had a different assertion error, which I'm creating a different bug for:

ubuntu@mongo1:~$ mongod --version
db version v2.2.0, pdfile version 4.5
Fri Jan 18 20:56:42 git version: f5e83eae9cfbec7fb7a071321928f00d1b0c5207

sudo -u mongodb mongod --dbpath=/db/mongodb --repair --repairpath=/export/mongodb --nojournal

Fri Jan 18 18:52:26 [initandlisten] 1926460400/3967177714 48%
Fri Jan 18 18:52:36 [initandlisten] 1927349300/3967177714 48%
Fri Jan 18 18:52:46 [initandlisten] 1928551200/3967177714 48%
Fri Jan 18 18:52:56 [initandlisten] 1929329200/3967177714 48%
Fri Jan 18 18:53:06 [initandlisten] 1930147300/3967177714 48%
Fri Jan 18 18:53:16 [initandlisten] 1931131500/3967177714 48%
Fri Jan 18 18:53:27 [initandlisten] 1931958000/3967177714 48%
Fri Jan 18 18:53:37 [initandlisten] 1933142600/3967177714 48%
Fri Jan 18 18:53:47 [initandlisten] 1934033200/3967177714 48%
Fri Jan 18 18:53:57 [initandlisten] 1935221200/3967177714 48%
Fri Jan 18 18:53:59 [initandlisten] pb3 Assertion failure le && !saveerrmsg.empty() src/mongo/db/pdfile.cpp 1381
0xade6e1 0x803dfd 0x74849e 0x7490bd 0xae2c0d 0x737f9c 0x8535bc 0x8560c9 0x856269 0x74037a 0x5596d8 0x55b78d 0x55c6f0 0x55d2dd 0x563dbe 0x565399 0x7f0873f5830d 0x557869
mongod(_ZN5mongo15printStackTraceERSo+0x21) [0xade6e1]
mongod(_ZN5mongo12verifyFailedEPKcS1_j+0xfd) [0x803dfd]
mongod(_ZN5mongo16insert_makeIndexEPNS_16NamespaceDetailsERKSsRKNS_7DiskLocE+0x7be) [0x74849e]
mongod(_ZN5mongo11DataFileMgr6insertEPKcPKvibbPb+0x93d) [0x7490bd]
mongod(_ZN5mongo17ensureHaveIdIndexEPKc+0x7ad) [0xae2c0d]
mongod(_ZN5mongo21ensureIdIndexForNewNsEPKc+0x9c) [0x737f9c]
mongod(_ZN5mongo6Cloner2goEPKcRKNS_12CloneOptionsERSt3setISsSt4lessISsESaISsEERSsPi+0xd1c) [0x8535bc]
mongod(_ZN5mongo6Cloner2goEPKcRSsRKSsbbbbbbPi+0x139) [0x8560c9]
mongod(_ZN5mongo9cloneFromEPKcRSsRKSsbbbbbbPi+0x59) [0x856269]
mongod(_ZN5mongo14repairDatabaseESsRSsbb+0x52a) [0x74037a]
mongod(_ZN5mongo11doDBUpgradeERKSsSsPNS_14DataFileHeaderE+0x68) [0x5596d8]
mongod() [0x55b78d]
mongod(_ZN5mongo14_initAndListenEi+0x480) [0x55c6f0]
mongod(_ZN5mongo13initAndListenEi+0x1d) [0x55d2dd]
mongod() [0x563dbe]
mongod(main+0x9) [0x565399]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed) [0x7f0873f5830d]
mongod(__gxx_personality_v0+0x469) [0x557869]
Fri Jan 18 18:54:00 [initandlisten] exception in initAndListen: 0 assertion src/mongo/db/pdfile.cpp:1381, terminating
Fri Jan 18 18:54:00 dbexit:
Fri Jan 18 18:54:00 [initandlisten] shutdown: going to close listening sockets...
Fri Jan 18 18:54:00 [initandlisten] shutdown: going to flush diaglog...
Fri Jan 18 18:54:00 [initandlisten] shutdown: going to close sockets...
Fri Jan 18 18:54:00 [initandlisten] shutdown: waiting for fs preallocator...
Fri Jan 18 18:54:00 [initandlisten] shutdown: closing all files...
Fri Jan 18 18:54:02 [initandlisten] 279/2819 9%
Fri Jan 18 18:54:04 [initandlisten] 578/2819 20%
Fri Jan 18 18:54:06 [initandlisten] 876/2819 31%
Fri Jan 18 18:54:08 [initandlisten] 1173/2819 41%
Fri Jan 18 18:54:10 [initandlisten] 1420/2819 50%
Fri Jan 18 18:54:12 [initandlisten] 1426/2819 50%
Fri Jan 18 18:54:14 [initandlisten] 1434/2819 50%
Fri Jan 18 18:54:16 [initandlisten] 1440/2819 51%
Fri Jan 18 18:54:18 [initandlisten] 1455/2819 51%
Fri Jan 18 18:54:20 [initandlisten] 1479/2819 52%
Fri Jan 18 18:54:22 [initandlisten] 1485/2819 52%
Fri Jan 18 18:54:24 [initandlisten] 1492/2819 52%
Fri Jan 18 18:54:26 [initandlisten] 1765/2819 62%
Fri Jan 18 18:54:28 [initandlisten] 2060/2819 73%
Fri Jan 18 18:54:30 [initandlisten] 2356/2819 83%
Fri Jan 18 18:54:32 [initandlisten] 2615/2819 92%
Fri Jan 18 18:54:34 [initandlisten] 2753/2819 97%
Fri Jan 18 18:54:34 [initandlisten] closeAllFiles() finished
Fri Jan 18 18:54:34 [initandlisten] shutdown: removing fs lock...
Fri Jan 18 18:54:34 dbexit: really exiting now