http://bugs.squeak.org/view.php?id=7732 says

Sample startup demonstrating the problem:

    FileStream stdout nextPutAll: '! is an exclamation mark'; flush.

which causes a SyntaxError whose content is:

    FileStream stdout nextPutAll: Unmatched string quote ->'
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This is probably caused by something thinking the startup script is in
chunk format?
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The bug is spectacularly annoying because you simply (*) cannot run a
script headless without first verifying that it works headfully. And
come on, the ! is in a _string_.

frank


(*) The whole startup script process needs to be reworked, and that's
well out of scope for this ticket or this thread, and we actually need
some kind of headless UIManager, and that too is out of scope for now!