Steam client crash: OUT OF MEMORY

[ghost]

***** OUT OF MEMORY! attempted allocation size: 1048576 ****
I left Steam client alone for a while, and when I came back to it, I found it crashed with following output. CrashID included:

memstd.cpp (2501) : Assertion Failed: OUT OF MEMORY
memstd.cpp (2501) : Fatal assert failed: /home/buildbot/buildslave_steam/steam_rel_client_ubuntu12_linux/build/src/tier0/memstd.cpp, line 2501. Application exiting.

Assert( Fatal assert ):/home/buildbot/buildslave_steam/steam_rel_client_ubuntu12_linux/build/src/tier0/memstd.cpp:2501

Installing breakpad exception handler for appid(steam)/version(1360966495_client)
Uploading dump (in-process) [proxy '']
/tmp/dumps/assert_20130219161121_2.dmp
success = yes
response: CrashID=bp-7fb668f0-5847-4722-ae7c-dc53c2130219
_ExitOnFatalAssert

[johndrinkwater]

Duplicate of #813, how long had you left it running? Did you have chat windows open or left it on the downloads screen?

[ghost]

I had it running for few hours, played one or two games, then I left it for about an hour before finding it crashed. I do not know when exactly did it crash during that last hour.