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The attached file data.db should be a valid bsddb file, still i get this crash on write:
 File "/usr/lib64/python2.7/bsddb/__init__.py", line 280, in wrapF
 self.db[key] = value
 DBRunRecoveryError: (-30974, 'DB_RUNRECOVERY: Fatal error, run database recovery -- PANIC: Invalid argument')
Full traceback: http://pastebin.com/A1VSPV9Q
I can reproduce the crash with python 2.7.2 with just these lines (it doesn't crash on empty db files):
import shelve
a = shelve.open("data.db")
b="crashin.."*20000
a['content/scenarios/tutorial_da.yaml'] = b
a['content/scenarios/tutorial_cs.yaml'] = b

The file is corrupted:
"""
jcea@ubuntu:/tmp/z$ /usr/local/BerkeleyDB.5.3/bin/db_verify data.db 
db_verify: BDB0551 Page 0: nonsensical free list pgno 55
db_verify: BDB1107 Page 2: offpage item 19 has bad pgno 70
db_verify: BDB1107 Page 20: offpage item 5 has bad pgno 59
db_verify: BDB1107 Page 36: offpage item 9 has bad pgno 94
db_verify: BDB1107 Page 37: offpage item 9 has bad pgno 57
db_verify: data.db: BDB0090 DB_VERIFY_BAD: Database verification failed
BDB5105 Verification of data.db failed.
"""
For "real world" usage, you must use Berkeley DB transactional storage mode. If you use a concurrent datastore or anything like that (anything more "simple" that the transactional mode), you can corrupt your database if the application or the computer crash in a bad moment. Or if you try to backup the database while writes are in progress, for instance. Briefly: use the transactional mode and read the Oracle documentation carefully!.
Closing the report as invalid, since the database is actually corrupt.