Pharo5 Jenkins build crash

CollectionIsEmpty: a Set() is empty
Set(Collection)>>errorEmptyCollection
Set(Collection)>>emptyCheck
Set(Collection)>>anyOne
Set(Collection)>>sum:
TestCommandLineHandler>>informResults:
TestCommandLineHandler>>runPackages
TestCommandLineHandler>>activate
TestCommandLineHandler class(CommandLineHandler class)>>activateWith:
[ aCommandLinehandler activateWith: commandLine ] in PharoCommandLineHandler(BasicCommandLineHandler)>>activateSubCommand: in Block: [ aCommandLinehandler activateWith: commandLine ]
BlockClosure>>on:do:
PharoCommandLineHandler(BasicCommandLineHandler)>>activateSubCommand:
PharoCommandLineHandler(BasicCommandLineHandler)>>handleSubcommand
PharoCommandLineHandler(BasicCommandLineHandler)>>handleArgument:
[ self
	handleArgument:
		(self arguments
			ifEmpty: [ '' ]
			ifNotEmpty: [ :arguments | arguments first ]) ] in PharoCommandLineHandler(BasicCommandLineHandler)>>activate in Block: [ self...
BlockClosure>>on:do:
PharoCommandLineHandler(BasicCommandLineHandler)>>activate
PharoCommandLineHandler>>activate
PharoCommandLineHandler class(CommandLineHandler class)>>activateWith:
[ super activateWith: aCommandLine ] in PharoCommandLineHandler class>>activateWith: in Block: [ super activateWith: aCommandLine ]
NonInteractiveUIManager(UIManager)>>defer:
PharoCommandLineHandler class>>activateWith:
[ aCommandLinehandler activateWith: commandLine ] in BasicCommandLineHandler>>activateSubCommand: in Block: [ aCommandLinehandler activateWith: commandLine ]
BlockClosure>>on:do:
BasicCommandLineHandler>>activateSubCommand:
BasicCommandLineHandler>>handleSubcommand
BasicCommandLineHandler>>handleArgument:
[ self
	handleArgument:
		(self arguments
			ifEmpty: [ '' ]
			ifNotEmpty: [ :arguments | arguments first ]) ] in BasicCommandLineHandler>>activate in Block: [ self...
BlockClosure>>on:do:
BasicCommandLineHandler>>activate
[ self new activate ] in BasicCommandLineHandler class>>startUp: in Block: [ self new activate ]
./pharo $JOB_NAME.image config http://smalltalkhub.com/mc/NorbertHartl/Mustache/main ConfigurationOfMustache --install=bleedingEdge
+ ./pharo Pillar.image config http://smalltalkhub.com/mc/NorbertHartl/Mustache/main ConfigurationOfMustache --install=bleedingEdge
'Installing ConfigurationOfMustache bleedingEdge'
Error: MessageNotUnderstood: receiver of "finish" is nil
UndefinedObject(Object)>>error:
[ :err :rcvr | 
| errCtx errMorph |
errCtx := thisContext.
[ errCtx := errCtx sender.
"Search the sender chain to find the morph causing the problem"
[ errCtx notNil and: [ errCtx receiver isMorph not ] ]
	whileTrue: [ errCtx := errCtx sender ].
"If we're at the root of the context chain then we have a fatal drawing problem"
errCtx ifNil: [ ^ self handleFatalDrawingError: err ].
errMorph := errCtx receiver.
"If the morph causing the problem has already the #drawError flag set,
			then search for the next morph above in the caller chain."
errMorph hasProperty: #errorOnDraw ] whileTrue.
errMorph setProperty: #errorOnDraw toValue: true.
"Install the old error handler, so we can re-raise the error"
rcvr error: err ] in WorldState>>displayWorldSafely: in Block: [ :err :rcvr | ...
BlockClosure>>cull:cull:
[ :ex | errorHandlerBlock cull: ex description cull: ex receiver ] in BlockClosure>>ifError: in Block: [ :ex | errorHandlerBlock cull: ex description cul...etc...
BlockClosure>>cull:
Context>>evaluateSignal:
Context>>handleSignal:
MessageNotUnderstood(Exception)>>signal
UndefinedObject(Object)>>doesNotUnderstand: #finish
WorldState>>displayWorld:submorphs:
WorldMorph>>displayWorld
[ aWorld displayWorld ] in WorldState>>displayWorldSafely: in Block: [ aWorld displayWorld ]
BlockClosure>>on:do:
BlockClosure>>ifError:
WorldState>>displayWorldSafely:
WorldState>>doOneCycleNowFor:
WorldState>>doOneCycleFor:
WorldMorph>>doOneCycle
[ [ World doOneCycle.
Processor yield.
false ] whileFalse: [  ] ] in MorphicUIManager>>spawnNewProcess in Block: [ [ World doOneCycle....
[ self value.
Processor terminateActive ] in BlockClosure>>newProcess in Block: [ self value....

I think that the problem is in command line handler but I'm not sure. You can see the complete log, for example, at https://ci.inria.fr/pharo-contribution/job/Pillar/1715/PHARO=50,VERSION=stable,VM=vm/console