What could an "optional update" be? I don't think I have installed any optional updates on my server. All updates are installed automatically by Steam CMD.
EDIT: I updated to the latest development version but it still gives me OUT OF MEMORY error.
EDIT2: The tail of the log is sometimes different:
Code:
Initializing Steam libraries for secure Internet server
[S_API FAIL] SteamAPI_Init() failed; SteamAPI_IsSteamRunning() failed.
Setting breakpad minidump AppID = 730
Looking up breakpad interfaces from steamclient
Calling BreakpadMiniDumpSystemInit
Setting breakpad minidump AppID = 740
Logging into anonymous gameserver account.
Connection to Steam servers successful.
Public IP is XXX.XXX.XXX.XXX.
Assigned anonymous gameserver Steam ID [A:1:2595038216(5508)].
VAC secure mode is activated.
GC Connection established for server version 181, instance idx 1
File id 138705234 not found. Probably removed from workshop
File id 140820289 not found. Probably removed from workshop
File id 141316588 not found. Probably removed from workshop
File id 238763714 not found. Probably removed from workshop
File id 335130931 not found. Probably removed from workshop
Setting mapgroup to '148068237'
PreMinidumpCallback: updating dump comment
assert_20150523165120_1.dmp[23576]: Uploading dump (out-of-process)
/tmp/dumps/assert_20150523165120_1.dmp
assert_20150523165120_1.dmp[23576]: Finished uploading minidump (out-of-process): success = no
assert_20150523165120_1.dmp[23576]: error: libcurl.so: cannot open shared object file: No such file or directory
assert_20150523165120_1.dmp[23576]: file ''/tmp/dumps/assert_20150523165120_1.dmp'', upload no: ''libcurl.so: cannot open shared object file: No such file or directory''
Segmentation fault (core dumped)
Add "-debug" to the ./srcds_run command line to generate a debug.log to help with solving this problem
Sat May 23 16:51:54 EEST 2015: Server restart in 10 seconds