PSPP-BUG: [bug #59120] Syntax lets psppire hang

[John Darrington]

Follow-up Comment #1, bug #59120 (project pspp):

 This issue can be classified as either "not a bug" or as "duplicate of bug
#40065".

At the end of the day, the syntax you pasted is erroneous (and it displays an
error message).   However a decision was made in pspp's design many years ago,
NOT to abort syntax processing at the first error.  Hence it tries to proceed;
and in this case finds an infinite loop.

This infinite loop hangs both the GUI and and the TUI.  Such behaviour is
perhaps not the most user intuitive.  But changing it would require some
careful considerations of the possible effects on other scenarios.

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