[Pharo-dev] ./pharo .st argument and quit/no quit

Hi there, can someone clarify this for me? lets say you execute in the terminal: pharo-vm-nox some.image save awesome.image —delete-old it starts, saves the image and deletes the old one and quits returning control to terminal but if you do: pharo-vm-nox some.image ImageBuilder.st save awesome.image —delete-old it stays forever open I was taking a look at this but what is ‘quit’ option? can someone explain the behaviour of this please? STCommandLineHandler>>end | quit | quit := self commandLine hasOption: 'quit'. (self commandLine hasOption: 'save') ifTrue: [ Smalltalk snapshot: true andQuit: quit ]. quit ifTrue: [ self exitSuccess ].