Freeze on Ubuntu

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ID:1264881
 
May 14 2013, 9:44 pm
BYOND Version:498
Operating System:Ubuntu 12.04 64-bit
Web Browser:Chrome 27.0.1453.81
Applies to:Dream Daemon
Status: Verified
A member of our crack team of bug testers has verified that this issue is reproducible, and has handed it off to the development team for investigation.
Descriptive Problem Summary:
Occasionally, my game will freeze and use 100% CPU until it's force killed. During this time, it doesn't respond to SIGUSR2 to print a backtrace, so I attached gdb and got:

#0  0xf6dde4e7 in ?? () from /lib/i386-linux-gnu/libc.so.6
#1  0xf74c05ac in ProtoStrCompSigned(ProtoStr*, ProtoStr*) ()
   from /usr/local/lib/libbyond.so
#2  0xf73d3c1c in DelProtoStr(unsigned long) () from /usr/local/lib/libbyond.so
#3  0xf73f4217 in DeallocateObj(unsigned long) ()
   from /usr/local/lib/libbyond.so
#4  0xf7450d11 in ?? () from /usr/local/lib/libbyond.so
#5  0xf744a5bd in CallByNameWithCallback_Attach(Value, unsigned char, unsigned long, Value, Value*, unsigned long, void (*)(Value, void*), void*) ()
   from /usr/local/lib/libbyond.so
#6  0xf744c75c in CallByNameWithCallback(Value, unsigned char, unsigned long, Value, Value*, unsigned long, void (*)(Value, void*), void*) ()
   from /usr/local/lib/libbyond.so
#7  0xf73d9919 in ?? () from /usr/local/lib/libbyond.so
#8  0xf73e5f45 in Values_Clear(Value*, unsigned long) ()
   from /usr/local/lib/libbyond.so
#9  0xf741731e in ?? () from /usr/local/lib/libbyond.so
#10 0xf742e0f4 in ?? () from /usr/local/lib/libbyond.so
#11 0xf7448d99 in ?? () from /usr/local/lib/libbyond.so
#12 0xf7449255 in TickProc(long) () from /usr/local/lib/libbyond.so
#13 0xf74101ea in ?? () from /usr/local/lib/libbyond.so
#14 0xf74daae7 in TimeLib::SystemAlarm() () from /usr/local/lib/libbyond.so
#15 0xf74ad80a in SocketLib::WaitForSocketIO(long, unsigned char) ()
   from /usr/local/lib/libbyond.so
#16 0x0804a3ee in ?? ()
#17 0xf6cc64d3 in __libc_start_main () from /lib/i386-linux-gnu/libc.so.6
#18 0x08049ed1 in ?? ()


Last world.log was: (I don't think these last entries were added when it froze though - the file's modified date is earlier.)
Sun May 12 15:17:57 2013
Auto-safety mode: safe (working directory access)
World opened on network port 8000.
Welcome BYOND! (4.0 Public Version 498.1158)
The BYOND hub reports that port 8000 is reachable.
BUG: Finished erasure with refcount=32 (ref=5:22) DM (:0)
BUG: Finished erasure with refcount=250 (ref=5:1) DM (:0)
BUG: Finished erasure with refcount=8 (ref=5:21) DM (:0)
BUG: Finished erasure with refcount=48 (ref=5:17) DM (:0)
BUG: Finished erasure with refcount=56 (ref=5:17) DM (:0)
BUG: Finished erasure with refcount=51 (ref=5:8) DM (:0)
BUG: Finished erasure with refcount=8 (ref=5:16) DM (:0)
BUG: Finished erasure with refcount=32 (ref=5:8) DM (:0)
BUG: Finished erasure with refcount=32 (ref=5:8) DM (:0)
BUG: Finished erasure with refcount=9 (ref=5:6) DM (:0)
BUG: Finished erasure with refcount=8 (ref=5:5) DM (:0)
BUG: Finished erasure with refcount=9 (ref=5:9) DM (:0)
BUG: Finished erasure with refcount=9 (ref=5:21) DM (:0)
BUG: Finished erasure with refcount=8 (ref=5:28) DM (:0)
BUG: Finished erasure with refcount=94 (ref=5:19) DM (:0)
BUG: Finished erasure with refcount=18 (ref=5:22) DM (:0)
BUG: Finished erasure with refcount=18 (ref=5:14) DM (:0)


As yet, I don't have a reliable test case. It's happened maybe 4 times over the past 2 weeks. It happened once in 496, too. The system logs are clean. Unsure at this stage whether it happens on other computers.
Does the backtrace give you any hints on what might be causing it?
May 14 2013, 10:07 pm
A few of my clients get this also it happens rarely though not as often as Murrawhip here, I never reported because those said clients are hosting rips and I assumed it being so rare it was an issue with the programming.

Admittedly I never check the backtrace as Murrawhip has done, the majority of my machines are on Ubuntu 12.04 and 11.04 32Bit
May 24 2013, 12:54 pm
Happened again. Didn't manage to get a backtrace this time.

Should I be running a version with debug symbols, or...?
I'd like to get this resolved.
Jun 8 2013, 8:40 am
I switched to a different server a few days ago, with Ubuntu 13.04 64-bit. Crashed just now.

#0  0xb6e86517 in ?? () from /lib/i386-linux-gnu/libc.so.6
#1  0xb756d5ac in ProtoStrCompSigned(ProtoStr*, ProtoStr*) () from /usr/local/lib/libbyond.so
#2  0xb7480c1c in DelProtoStr(unsigned long) () from /usr/local/lib/libbyond.so
#3  0xb74a1217 in DeallocateObj(unsigned long) () from /usr/local/lib/libbyond.so
#4  0xb74fdd11 in ?? () from /usr/local/lib/libbyond.so
#5  0xb74f75bd in CallByNameWithCallback_Attach(Value, unsigned char, unsigned long, Value, Value*, unsigned long, void (*)(Value, void*), void*) ()
   from /usr/local/lib/libbyond.so
#6  0xb74f975c in CallByNameWithCallback(Value, unsigned char, unsigned long, Value, Value*, unsigned long, void (*)(Value, void*), void*) ()
   from /usr/local/lib/libbyond.so
#7  0xb7486919 in ?? () from /usr/local/lib/libbyond.so
#8  0xb7492f45 in Values_Clear(Value*, unsigned long) () from /usr/local/lib/libbyond.so
#9  0xb74c431e in ?? () from /usr/local/lib/libbyond.so
#10 0xb74db0f4 in ?? () from /usr/local/lib/libbyond.so
#11 0xb74f5d99 in ?? () from /usr/local/lib/libbyond.so
#12 0xb74f6255 in TickProc(long) () from /usr/local/lib/libbyond.so
#13 0xb74bd1ea in ?? () from /usr/local/lib/libbyond.so
#14 0xb7587ae7 in TimeLib::SystemAlarm() () from /usr/local/lib/libbyond.so
#15 0xb755a80a in SocketLib::WaitForSocketIO(long, unsigned char) () from /usr/local/lib/libbyond.so
#16 0x0804a3ee in ?? ()
#17 0xb6d6e4d3 in __libc_start_main () from /lib/i386-linux-gnu/libc.so.6
#18 0x08049ed1 in ?? ()
Jun 10 2013, 12:34 pm (Edited on Jun 10 2013, 12:53 pm)
Crashed again...
Are there any hints as to what kind of situations could cause this? So that I can at least try to prevent it in my game?

A version of BYOND with debugging symbols would get me that #0 which might show something, right?

Log up until the crash:
Sat Jun  8 13:16:34 2013
Auto-safety mode: safe (working directory access)
World opened on network port 8000.
Welcome BYOND! (4.0 Public Version 498.1158)
BUG: Unexpected certificate (2)
BUG: Finished erasure with refcount=8 (ref=5:1) DM (:0)
BUG: Finished erasure with refcount=48 (ref=5:31) DM (:0)
BUG: Finished erasure with refcount=16 (ref=5:44) DM (:0)
BUG: Finished erasure with refcount=24 (ref=5:21) DM (:0)
BUG: Unexpected certificate (6)
BUG: Finished erasure with refcount=10 (ref=5:22) DM (:0)
BUG: Finished erasure with refcount=10 (ref=5:22) DM (:0)
BUG: Finished erasure with refcount=16 (ref=5:19) DM (:0)
BUG: Finished erasure with refcount=5 (ref=5:31) DM (:0)
BUG: Finished erasure with refcount=16 (ref=5:52) DM (:0)
BUG: Finished erasure with refcount=104 (ref=5:6) DM (:0)
BUG: Finished erasure with refcount=5 (ref=5:7) DM (:0)
BUG: Unexpected certificate (2)
BUG: Finished erasure with refcount=482 (ref=5:6) DM (:0)
BUG: Finished erasure with refcount=24 (ref=5:10) DM (:0)
BUG: Finished erasure with refcount=24 (ref=5:6) DM (:0)
BUG: Finished erasure with refcount=10 (ref=5:5) DM (:0)
BUG: Finished erasure with refcount=8 (ref=5:17) DM (:0)
BUG: Finished erasure with refcount=10 (ref=5:19) DM (:0)
BUG: Finished erasure with refcount=16 (ref=5:22) DM (:0)
BUG: Finished erasure with refcount=9 (ref=5:7) DM (:0)
BUG: Finished erasure with refcount=5 (ref=5:10) DM (:0)
Jun 13 2013, 2:56 pm
A client of mine is receiving the freezes also

Log file

Wed Jun 12 22:58:36 2013
Debug Message: Dooney had no top card of Deck. Please report it.
BUG: Finished erasure with refcount=2 (ref=5:2) DM (:65535)
BUG: Finished erasure with refcount=2 (ref=5:5) DM (:0)
BUG: Finished erasure with refcount=2 (ref=5:5) DM (:0)
BUG: Finished erasure with refcount=3 (ref=5:5) DM (:0)
BUG: Finished erasure with refcount=4 (ref=5:3) DM (:0)
BUG: Finished erasure with refcount=2 (ref=5:2) DM (:0)
BUG: Finished erasure with refcount=3 (ref=5:3) DM (:0)
BUG: Finished erasure with refcount=3 (ref=5:2) DM (:0)
BUG: Finished erasure with refcount=3 (ref=5:3) DM (:0)
BUG: Finished erasure with refcount=4 (ref=5:0) DM (:0)
Thu Jun 13 02:37:45 2013
Debug Message: Dooney had no top card of Deck. Please report it.
BUG: Finished erasure with refcount=3 (ref=5:0) DM (:65535)
Debug Message: Dooney had no top card of Deck. Please report it.
BUG: Finished erasure with refcount=3 (ref=5:6) DM (:65535)
BUG: Finished erasure with refcount=3 (ref=5:4) DM (:0)
BUG: Finished erasure with refcount=3 (ref=5:6) DM (:0)
Debug Message: Darth the Jimmie Rustler had no top card of Deck. Please report it.
runtime error: type mismatch: "????" += -1
proc name: ChangeAD (/obj/cards/proc/ChangeAD)
  usr: Darth the Jimmie Rustler (/mob)
  src: The Winged Dragon of Ra (/obj/cards/monster/OOAK/the_winged_dragon_of_ra)
  call stack:
The Winged Dragon of Ra (/obj/cards/monster/OOAK/the_winged_dragon_of_ra): ChangeAD("+-1", 0, "Attack")
Darth the Jimmie Rustler (/mob): Ra(The Winged Dragon of Ra (/obj/cards/monster/OOAK/the_winged_dragon_of_ra))
Darth the Jimmie Rustler (/mob): Effect(The Winged Dragon of Ra (/obj/cards/monster/OOAK/the_winged_dragon_of_ra))
Darth the Jimmie Rustler (/mob): CrdOption("Activate Effect", The Winged Dragon of Ra (/obj/cards/monster/OOAK/the_winged_dragon_of_ra))
Darth the Jimmie Rustler (/mob): CardClick(The Winged Dragon of Ra (/obj/cards/monster/OOAK/the_winged_dragon_of_ra))
The Winged Dragon of Ra (/obj/cards/monster/OOAK/the_winged_dragon_of_ra): Click( (64,54,1) (/turf/FLOOR/ROAD), "_map.map1", "icon-x=14;icon-y=15;left=1;scr...")
runtime error: type mismatch: "????" += -1
proc name: Ra (/mob/proc/Ra)
  usr: Darth the Jimmie Rustler (/mob)
  src: Darth the Jimmie Rustler (/mob)
  call stack:
Darth the Jimmie Rustler (/mob): Ra(The Winged Dragon of Ra (/obj/cards/monster/OOAK/the_winged_dragon_of_ra))
Darth the Jimmie Rustler (/mob): Effect(The Winged Dragon of Ra (/obj/cards/monster/OOAK/the_winged_dragon_of_ra))
Darth the Jimmie Rustler (/mob): CrdOption("Activate Effect", The Winged Dragon of Ra (/obj/cards/monster/OOAK/the_winged_dragon_of_ra))
Darth the Jimmie Rustler (/mob): CardClick(The Winged Dragon of Ra (/obj/cards/monster/OOAK/the_winged_dragon_of_ra))
The Winged Dragon of Ra (/obj/cards/monster/OOAK/the_winged_dragon_of_ra): Click( (64,54,1) (/turf/FLOOR/ROAD), "_map.map1", "icon-x=14;icon-y=15;left=1;scr...")
runtime error: type mismatch: "????" += 799
proc name: ChangeAD (/obj/cards/proc/ChangeAD)
  usr: StormDell (/mob)
  src: The Winged Dragon of Ra (/obj/cards/monster/OOAK/the_winged_dragon_of_ra)
  call stack:
The Winged Dragon of Ra (/obj/cards/monster/OOAK/the_winged_dragon_of_ra): ChangeAD("+7999", 0, "Attack")
StormDell (/mob): Ra(The Winged Dragon of Ra (/obj/cards/monster/OOAK/the_winged_dragon_of_ra))
StormDell (/mob): Effect(The Winged Dragon of Ra (/obj/cards/monster/OOAK/the_winged_dragon_of_ra))
StormDell (/mob): CrdOption("Activate Effect", The Winged Dragon of Ra (/obj/cards/monster/OOAK/the_winged_dragon_of_ra))
StormDell (/mob): CardClick(The Winged Dragon of Ra (/obj/cards/monster/OOAK/the_winged_dragon_of_ra))
The Winged Dragon of Ra (/obj/cards/monster/OOAK/the_winged_dragon_of_ra): Click( (64,56,1) (/turf/FLOOR/ROAD), "_map.map1", "icon-x=12;icon-y=10;left=1;scr...")
runtime error: type mismatch: "????" += 7999
proc name: Ra (/mob/proc/Ra)
BUG: Finished erasure with refcount=3 (ref=5:1) DM (:0)
BUG: Finished erasure with refcount=3 (ref=5:3) DM (:0)
runtime error: Cannot read null.mob
proc name: w say (/mob/verb/w_say)
BUG: Finished erasure with refcount=3 (ref=5:0) DM (:0)
BUG: Finished erasure with refcount=2 (ref=5:6) DM (:0)
BYOND Error: failed to certify SuperLengend
BUG: Finished erasure with refcount=3 (ref=5:4) DM (:0)
Warning: type read from file (/obj/cards/spell/LOB/swords_of_revealing_light) is not defined
Warning: type read from file (/obj/cards/spell/LOB/swords_of_revealing_light) is not defined
BUG: Finished erasure with refcount=3 (ref=5:2) DM (:0)
BUG: Finished erasure with refcount=2 (ref=5:5) DM (:0)
BUG: Sequence number 2FBD expected but 9697 received
BUG: Finished erasure with refcount=3 (ref=5:1) DM (:0)
BUG: Finished erasure with refcount=3 (ref=5:4) DM (:0)
BUG: Finished erasure with refcount=3 (ref=5:2) DM (:0)
BUG: Finished erasure with refcount=2 (ref=5:5) DM (:0)
BUG: Finished erasure with refcount=2 (ref=5:8) DM (:0)
BUG: Finished erasure with refcount=2 (ref=5:5) DM (:0)
BUG: Finished erasure with refcount=3 (ref=5:0) DM (:0)
BUG: Finished erasure with refcount=4 (ref=5:3) DM (:0)
BUG: Finished erasure with refcount=3 (ref=5:0) DM (:0)
BUG: Finished erasure with refcount=2 (ref=5:2) DM (:0)
BUG: Finished erasure with refcount=5 (ref=5:6) DM (:0)
BUG: Sequence number CA2C expected but   C2 received
BUG: Finished erasure with refcount=2 (ref=5:3) DM (:0)
BUG: Finished erasure with refcount=2 (ref=5:4) DM (:0)
BUG: Finished erasure with refcount=2 (ref=5:6) DM (:0)
BUG: Finished erasure with refcount=2 (ref=5:4) DM (:0)
BUG: Finished erasure with refcount=2 (ref=5:7) DM (:0)
BUG: Finished erasure with refcount=3 (ref=5:3) DM (:0)
BUG: Finished erasure with refcount=3 (ref=5:4) DM (:0)
BUG: Finished erasure with refcount=5 (ref=5:5) DM (:0)
BUG: Finished erasure with refcount=4 (ref=5:1) DM (:0)
BUG: Finished erasure with refcount=3 (ref=5:2) DM (:0)
BUG: Finished erasure with refcount=5 (ref=5:0) DM (:0)
BUG: Finished erasure with refcount=3 (ref=5:3) DM (:0)
BUG: Finished erasure with refcount=3 (ref=5:0) DM (:0)
Thu Jun 13 19:47:37 2013
Debug Message: Tristah had no top card of Deck. Please report it.
BUG: Finished erasure with refcount=3 (ref=5:0) DM (:0)
BUG: Finished erasure with refcount=2 (ref=5:4) DM (:0)
BUG: Finished erasure with refcount=3 (ref=5:0) DM (:0)
BUG: Finished erasure with refcount=4 (ref=5:1) DM (:0)
BUG: Finished erasure with refcount=4 (ref=5:1) DM (:0)
BUG: Finished erasure with refcount=2 (ref=5:1) DM (:65535)
BUG: Finished erasure with refcount=4 (ref=5:2) DM (:0)
BUG: Finished erasure with refcount=3 (ref=5:1) DM (:0)
BUG: Finished erasure with refcount=3 (ref=5:1) DM (:0)
BUG: Finished erasure with refcount=3 (ref=5:1) DM (:0)
BUG: Finished erasure with refcount=2 (ref=5:0) DM (:0)
BUG: Finished erasure with refcount=2 (ref=5:3) DM (:0)


Complaint

Hello Daniel,
I've been running my server with no issues facing me ,but yesterday I encountered a freezing problem ,everyone disconnected and was unable to login back for some minutes..
now the problem happened again around the same time ,the server froze again and everyone got kicked out ,it keep saying "connecting..." but it never connects even if I leave it for a long time that it even disappeared from the game hub ,I checked the server and it says its running ..any solutions other? note that I can't restart the game or else I will lose alot of things.
regards

Apart from this freeze the server is running perfectly fine, I am currently hosting a chat game 20 minutes + no freeze issues.

I would love a response on this from a Dev.... I bet @Murrawhip would too.
Jun 13 2013, 3:04 pm
Are these DD reports WITH #define DEBUG on?
Jun 13 2013, 3:08 pm
In response to Super Saiyan X
I don't know, I will email my client now in regards to that now.
Jun 13 2013, 4:27 pm
ATHK's aren't, as they don't show the line numbers for the runtimes.
Mine does have DEBUG, yes.
Jun 13 2013, 4:41 pm
In response to Murrawhip
You are 100% correct and on top of that my client doesn't have any access to the source for that specific game, so his issue might just remain a mistery :(
Jun 13 2013, 4:45 pm (Edited on Jun 13 2013, 4:50 pm)
Well, on the topic of refcount errors; refcount 5 is the client.
Lummox theorized this:
Reference type 5 is a client object. This means the garbage collector has received a delete request for a client object and the reference count isn't coming out 0 like it expected.

Other users have seen this come up in their projects. I believe it's connected to something being done with the skin, or with world.Export(), but I'm really not sure because I've never found a reliable test case.

Do any of those (skin, Export, maybe some kind of loop involving clients?) appear in your game, Murrawhip?
Jun 13 2013, 5:08 pm
In response to Super Saiyan X
Super Saiyan X wrote:
Do any of those (skin, Export, maybe some kind of loop involving clients?) appear in your game, Murrawhip?

I use skins, export, and loop through clients.
Though the refcount errors aren't occurring immediately before the freeze. They seem to happen every now and then, with no consequence. (We could really use timestamps on those BUG messages).

The freeze doesn't output anything to the log at all. Just immediate 100% CPU usage.
Jun 15 2013, 7:24 am
It froze again today. I'm not absolutely certain if it was the same 100% CPU thing that I've been experiencing lately because I wasn't online at the time. The server seemed to recover after 15 minutes so it was either this, or network.
I figure if it did recover, it'd write its problem to the log at the moment of recovery. I would be able to tell which messages came at the moment of recovery if I had BUG timestamps. :)

World opened on network port 8000.
Welcome BYOND! (4.0 Public Version 498.1158)
BUG: Finished erasure with refcount=5 (ref=5:3) DM (:0)
BUG: Finished erasure with refcount=17 (ref=5:31) DM (:0)
BUG: Finished erasure with refcount=5 (ref=5:3) DM (:0)
BUG: Finished erasure with refcount=16 (ref=5:1) DM (:0)
BUG: Bad ref (2:3934793984) in DecRefCount(DM Login.dm:597)
BUG: Finished erasure with refcount=26 (ref=5:3) DM (:0)
BUG: Finished erasure with refcount=609 (ref=5:25) DM (:0)
BUG: Finished erasure with refcount=5 (ref=5:4) DM (:0)
BUG: Finished erasure with refcount=8 (ref=5:5) DM (:0)
BUG: Unexpected certificate (2)
BUG: Finished erasure with refcount=8 (ref=5:40) DM (:0)
BUG: Finished erasure with refcount=5 (ref=5:4) DM (:0)
BUG: Finished erasure with refcount=24 (ref=5:31) DM (:0)
BUG: Finished erasure with refcount=8 (ref=5:12) DM (:0)
BUG: Finished erasure with refcount=267 (ref=5:22) DM (:0)
BUG: Finished erasure with refcount=7 (ref=5:4) DM (:0)
BUG: Unexpected certificate (2)
BUG: Unexpected hub certificate (2)
BUG: Unexpected certificate (2)
BUG: Sequence number 549D expected but   C2 received
BUG: Unexpected certificate (2)
BUG: Finished erasure with refcount=7 (ref=5:5) DM (:0)
BUG: Finished erasure with refcount=56 (ref=5:22) DM (:0)
BUG: Finished erasure with refcount=27 (ref=5:5) DM (:0)
BUG: Unexpected certificate (2)
BUG: Finished erasure with refcount=6 (ref=5:5) DM (:0)
BUG: Finished erasure with refcount=8 (ref=5:1) DM (:0)
BUG: Unexpected certificate (2)
BUG: Unexpected hub certificate (2)
BUG: Unexpected file transmission (packet_num = 2 (expected = 1),max=131,pid=4294967295)
BUG: Removing corrupt rsc entry 'cat-walks-off-counter.gif'
BUG: Failed to complete download
BUG: Finished erasure with refcount=6 (ref=5:5) DM (:0)
BUG: Finished erasure with refcount=26 (ref=5:40) DM (:0)
BUG: Finished erasure with refcount=6 (ref=5:5) DM (:0)
BUG: Finished erasure with refcount=49 (ref=5:23) DM (:0)
BUG: Finished erasure with refcount=8 (ref=5:5) DM (:0)
BUG: Finished erasure with refcount=6 (ref=5:15) DM (:0)
BUG: Sequence number 7DFF expected but   C2 received
BUG: Sequence number B8E9 expected but   C2 received
BUG: Finished erasure with refcount=8 (ref=5:16) DM (:0)
BUG: Sequence number E5F8 expected but   C2 received
BUG: Sequence number E030 expected but   C2 received
BUG: Sequence number 70BC expected but   C2 received
BUG: Sequence number 9C99 expected but   C2 received
BUG: Sequence number 18A8 expected but   C2 received
BUG: Unexpected certificate (2)
BUG: Unexpected hub certificate (2)
BUG: Unexpected hub certificate (65535)
BUG: Finished erasure with refcount=8 (ref=5:42) DM (:0)
BUG: Unexpected hub certificate (2)
BUG: Unexpected hub certificate (2)
BUG: Sequence number CCD6 expected but   C2 received
BUG: Finished erasure with refcount=1 (ref=5:8) DM (Login.dm:953)
BUG: Bad ref (5:8) in DecRefCount(DM Login.dm:953)
BUG: Sequence number 640F expected but   81 received
BUG: Unexpected hub certificate (2)
BUG: Sequence number EC88 expected but   C2 received
BUG: Unexpected hub certificate (2)
Jun 15 2013, 4:18 pm
Hazordhu apparently gets this issue as well.

I've also been seeing a lot of "BUG: refcount" errors.
They appear to happen when a player disconnects.

No BUGs are around the last line in the log, though it may have just crashed at that point.

I've also seen some "Sequence number" errors.

As far as I know, the server's running build 1185... I'd have to ask the guy to update it, since I think the refcount bug was resolved.
Jun 15 2013, 9:42 pm (Edited on Jun 15 2013, 10:10 pm)
I'm also getting refcount errors and the 'unexpected certificate' warning:

version 499.1193

BUG: Finished erasure with refcount=1 (ref=3:566) DM (summon.dm:31)
BUG: Finished erasure with refcount=1 (ref=3:560) DM (summon.dm:31)
BUG: Unexpected certificate (2)
BUG: Finished erasure with refcount=1 (ref=3:554) DM (summon.dm:31)
BUG: Finished erasure with refcount=1 (ref=3:549) DM (summon.dm:31)
BUG: Unexpected hub certificate (65535)
BUG: Finished erasure with refcount=1 (ref=3:522) DM (summon.dm:31)
BUG: Finished erasure with refcount=1 (ref=3:530) DM (summon.dm:31)
BUG: Finished erasure with refcount=1 (ref=3:532) DM (summon.dm:31)
Jun 15 2013, 10:03 pm
This is getting a tad ridiculous...
Jun 16 2013, 5:07 am (Edited on Jun 16 2013, 5:15 am)
In response to Writing A New One
Writing A New One wrote:
I'm also getting refcount errors and the 'unexpected certificate' warning:

version 499.1193

BUG: Finished erasure with refcount=1 (ref=3:566) DM (summon.dm:31)
BUG: Finished erasure with refcount=1 (ref=3:560) DM (summon.dm:31)
BUG: Unexpected certificate (2)
BUG: Finished erasure with refcount=1 (ref=3:554) DM (summon.dm:31)
BUG: Finished erasure with refcount=1 (ref=3:549) DM (summon.dm:31)
BUG: Unexpected hub certificate (65535)
BUG: Finished erasure with refcount=1 (ref=3:522) DM (summon.dm:31)
BUG: Finished erasure with refcount=1 (ref=3:530) DM (summon.dm:31)
BUG: Finished erasure with refcount=1 (ref=3:532) DM (summon.dm:31)

These errors aren't the same as ATHK's and Murrahwip's. Theirs ref (5) points to clients.

I think 3 is mobs. A bug involving refcounts was fixed in the most recent version (1194), for stuff involving bounds/obounds. (ID:1224959) See if that build helps you.
Jun 16 2013, 6:32 am
Just FYI the 1193 for linux should have the recent refcount fix, but it is in 1194 for windows (so basically the latest version of each). So let us know if you are on the latest and we'll get to the bottom of it.
Jun 16 2013, 11:58 am
In response to Writing A New One
Writing A New One wrote:
version 499.1193

Tom ;)
Jun 16 2013, 12:00 pm
If the linux build of 1193 didn't fix the issue for him; then he should report that bug separately, with a code snippet/reproducible demo. 'cause WANO's bug (I'm pretty sure) is unrelated to this, as his happens in the actual code to mobs.
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