Eliot,

I am getting a segmentation fault running Cog headless on linux.  Here is 
the stack dump.  Below is a second stack dump that looks different.

HTH,
Rob

FIRST STACK DUMP

vawhigso at vawhigs.org [~/public_html/squeakelib/Cog]# kill -USR1 30247
vawhigso at vawhigs.org [~/public_html/squeakelib/Cog]#
Received user signal, printing active stack:

0xff940ab8 I SmalltalkImage>garbageCollect -1207282732: a(n) SmalltalkImage
0xff940ad0 M Introducer class>areVatsRunning -1144872564: a(n) Introducer 
class
0xff940ae8 M PluggableButtonMorph>getModelState -1134952004: a(n) 
PluggableButtonMorph
0xff940b00 M PluggableButtonMorph>update: -1134952004: a(n) 
PluggableButtonMorph
0xff940b1c M StepMessage(MessageSend)>value -1134947088: a(n) StepMessage
0xff940b38 M StepMessage(MorphicAlarm)>value: -1134947088: a(n) StepMessage
0xff940b64 M WorldState>runLocalStepMethodsIn: -1215450852: a(n) WorldState
0xff940b90 M WorldState>runStepMethodsIn: -1215450852: a(n) WorldState
0xff940bac M PasteUpMorph>runStepMethods -1215450600: a(n) PasteUpMorph
0xff940bc8 M WorldState>doOneCycleNowFor: -1215450852: a(n) WorldState
0xff940be4 M WorldState>doOneCycleFor: -1215450852: a(n) WorldState
0xff940c00 M PasteUpMorph>doOneCycle -1215450600: a(n) PasteUpMorph
0xff940c20 I [] in Project class>spawnNewProcess -1138060792: a(n) Project 
class
-1133485544 s [] in
Segmentation fault



Smalltalk stack dump:
0xff940ab8 I SmalltalkImage>garbageCollect -1207282732: a(n) SmalltalkImage
0xff940ad0 M Introducer class>areVatsRunning -1144872564: a(n) Introducer 
class
0xff940ae8 M PluggableButtonMorph>getModelState -1134952004: a(n) 
PluggableButtonMorph
0xff940b00 M PluggableButtonMorph>update: -1134952004: a(n) 
PluggableButtonMorph
0xff940b1c M StepMessage(MessageSend)>value -1134947088: a(n) StepMessage
0xff940b38 M StepMessage(MorphicAlarm)>value: -1134947088: a(n) StepMessage
0xff940b64 M WorldState>runLocalStepMethodsIn: -1215450852: a(n) WorldState
0xff940b90 M WorldState>runStepMethodsIn: -1215450852: a(n) WorldState
0xff940bac M PasteUpMorph>runStepMethods -1215450600: a(n) PasteUpMorph
0xff940bc8 M WorldState>doOneCycleNowFor: -1215450852: a(n) WorldState
0xff940be4 M WorldState>doOneCycleFor: -1215450852: a(n) WorldState
0xff940c00 M PasteUpMorph>doOneCycle -1215450600: a(n) PasteUpMorph
0xff940c20 I [] in Project class>spawnNewProcess -1138060792: a(n) Project 
class


SECOND STACK DUMP

vawhigso at vawhigs.org [~/public_html/squeakelib/Cog]# kill -USR1 7340

Received user signal, printing active stack:

vawhigso at vawhigs.org [~/public_html/squeakelib/Cog]# 0xffaf3398 I 
SmalltalkImage>garbageCollect -1207897132: a(n) SmalltalkImage
0xffaf33b0 M Introducer class>areVatsRunning -1145486964: a(n) Introducer 
class
0xffaf33c8 M PluggableButtonMorph>getModelState -1135564980: a(n) 
PluggableButtonMorph
0xffaf33e0 M PluggableButtonMorph>update: -1135564980: a(n) 
PluggableButtonMorph
0xffaf33fc M StepMessage(MessageSend)>value -1135561416: a(n) StepMessage
0xffaf3418 M StepMessage(MorphicAlarm)>value: -1135561416: a(n) StepMessage
0xffaf3444 M WorldState>runLocalStepMethodsIn: -1216065252: a(n) WorldState
0xffaf3470 M WorldState>runStepMethodsIn: -1216065252: a(n) WorldState
0xffaf348c M PasteUpMorph>runStepMethods -1216065000: a(n) PasteUpMorph
0xffaf34a8 M WorldState>doOneCycleNowFor: -1216065252: a(n) WorldState
0xffaf34c4 M WorldState>doOneCycleFor: -1216065252: a(n) WorldState
0xffaf34e0 M PasteUpMorph>doOneCycle -1216065000: a(n) PasteUpMorph
0xffaf3500 I [] in Project class>spawnNewProcess -1138675192: a(n) Project 
class
-1134099944 s [] in BlockClosure>newProcess

Received user signal, printing all processes:

Process 0xbc670278 priority 40
0xffaf3398 I SmalltalkImage>garbageCollect -1207897132: a(n) SmalltalkImage
0xffaf33b0 M Introducer class>areVatsRunning -1145486964: a(n) Introducer 
class
0xffaf33c8 M PluggableButtonMorph>getModelState -1135564980: a(n) 
PluggableButtonMorph
0xffaf33e0 M PluggableButtonMorph>update: -1135564980: a(n) 
PluggableButtonMorph
0xffaf33fc M StepMessage(MessageSend)>value -1135561416: a(n) StepMessage
0xffaf3418 M StepMessage(MorphicAlarm)>value: -1135561416: a(n) StepMessage
0xffaf3444 M WorldState>runLocalStepMethodsIn: -1216065252: a(n) WorldState
0xffaf3470 M WorldState>runStepMethodsIn: -1216065252: a(n) WorldState
0xffaf348c M PasteUpMorph>runStepMethods -1216065000: a(n) PasteUpMorph
0xffaf34a8 M WorldState>doOneCycleNowFor: -1216065252: a(n) WorldState
0xffaf34c4 M WorldState>doOneCycleFor: -1216065252: a(n) WorldState
0xffaf34e0 M PasteUpMorph>doOneCycle -1216065000: a(n) PasteUpMorph
0xffaf3500 I [] in Project class>spawnNewProcess -1138675192: a(n) Project 
class
-1134099944 s [] in BlockClosure>newProcess

Process 0xbc97fc44 priority 50
0xffafa4c0 M WeakArray class>finalizationProcess -1210174624: a(n) WeakArray 
class
0xffafa4e0 I [] in WeakArray class>restartFinalizationProcess -1210174624: 
a(n) WeakArray class
0xffafa500 I [] in BlockClosure>newProcess -1130890396: a(n) BlockClosure

Process 0xb8125518 priority 80
widowed caller frame

EventualProcess 0xbbbd6e10 priority 60
-1134095516 s [] in Delay>wait
-1134049404 s BlockClosure>ifCurtailed:
-1134095648 s Delay>wait
-1134049312 s [] in VatTPManager class>finalizationLoop
-1145210696 s BlockClosure>repeat
-1145213336 s VatTPManager class>finalizationLoop
-1145213520 s [] in VatTPManager class>?

EventualProcess 0xbc5c9174 priority 30
-1134783048 s SharedQueue>next
-1134783140 s [] in Vat>processSends
-1134751716 s BlockClosure>ifCurtailed:
-1134783276 s Vat>processSends
-1134783984 s [] in EventualProcess>setupContext

Process 0xbc86c01c priority 60
0xffaf44c0 I RFBEventSensor(InputSensor)>userInterruptWatcher -1130865472: 
a(n) RFBEventSensor
0xffaf44e0 I [] in 
RFBEventSensor(InputSensor)>installInterruptWatcher -1130865472: a(n) 
RFBEventSensor
0xffaf4500 I [] in BlockClosure>newProcess -1132019908: a(n) BlockClosure

Process 0xbc86c1dc priority 60
widowed caller frame 
8T¯ÿ"¨r·Z¼ð·ð·Z¼ð·¸§r·TT¯ÿòr·¨Z¼Z¼Â¼4Z¼ir·tT¯ÿT·Â¼üY¼Â¼À\¼ð··T¯ÿ¦·sZ¼ðZ¼ð·8·s·ÀT¯ÿ(õq·$Z¼¤*îZ¼üY¼Â¼À\¼ 
 ]¹·

Process 0xbc86c3c8 priority 60
0xffaf74c0 I SmalltalkImage>lowSpaceWatcher -1207897132: a(n) SmalltalkImage
0xffaf74e0 I [] in SmalltalkImage>installLowSpaceWatcher -1207897132: a(n) 
SmalltalkImage
0xffaf7500 I [] in BlockClosure>newProcess -1132018968: a(n) BlockClosure

Process 0xbc985ef0 priority 60
widowed caller frame HÓ¯ÿúq·À\¼ð·ð·À\¼ð· úq·lÓ¯ÿ(õq·Ô\¼À\¼D\¼¸·

Segmentation fault


Can't dump Smalltalk stack. Not in VM thread

Most recent primitives
wait
signal
millisecondClockValue
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perform:with:
basicNew:
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value:
millisecondClockValue
basicNew
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new:
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primSocketConnectionStatus:
millisecondClockValue
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byteAt:put:
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findNextHandlerContextStarting
tempAt:
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tempAt:put:
valueNoContextSwitch
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findNextUnwindContextUpTo:
tempAt:
tempAt:put:
tempAt:
terminateTo:
value
tempAt:put:
findNextUnwindContextUpTo:
terminateTo:
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value
value
millisecondClockValue
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millisecondClockValue
millisecondClockValue
basicNew
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signal
at:put:
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primitiveGarbageCollect