On Mar 1, 2005, at 9:01 AM, Chris Miles wrote:
Hi, I have recently come across what looks like a serious bug with Python on OS X. While writing a program using imaplib to connect to some IMAP4 servers I encountered a MemoryError exception with a malloc() error which was easily reproducible with my data at the time. The malloc error was:
*** malloc: vm_allocate(size=9252864) failed (error code=3) *** malloc[1522]: error: Can't allocate region
A thread on comp.lang.python shows that this bug has been encountered by others as well.
http://groups-beta.google.com/group/comp.lang.python/browse_thread/ thread/cd5a8f28b021c269/cf7e574e3bc566df
I tested my program on my standard OS X 10.3 Python (2.3) as well as a build of 2.4 and found the same MemoryError. (btw: I had plenty of free RAM at the time. Over 1/4 of 1GB on a powerbook G4)
I tested the exact same program connecting to the exact same IMAP4 server (Exchange actually) on a Linux box and it worked fine (actually a Linux host running in VPC on the very same Mac).
The data that was causing the MemoryError was a 9 MB mail message on the IMAP server. After I deleted this message the program on the Mac ran fine. The other messages were max 1 MB in size and there were about 114 of them. (The program downloads every message from a user's IMAP account, amongst other things.)
Attached is a full Traceback of the MemoryError (as formatted by iPython).
Is this a known issue, or should I submit it somewhere?
You can try it on Python CVS and see if it has been fixed. The bug in question is <http://python.org/sf/1092502>.
-bob
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