PSPP-BUG: [bug #15702] DO REPEAT command should support multiple variable lists.

[Ben Pfaff]

Follow-up Comment #2, bug #15702 (project pspp):

This bug was seemingly fixed long ago, because there is a test in the source
tree that checks that a command similar to the example below works.  The
example below has a couple of problems: "h" has 
one more substitution than "x", which is not allowed, and "t" is undeclared
(should probably be "x").

However, a new bug was introduced by the recent change that broke up the getl
code.  This code adds a getl_interface to the repeat code but doesn't supply
->name or ->location member functions, thus the following small change to the
example dumps core because it tries to issue an error message inside DO REPEAT
(due to "t" not being a valid variable name):

INPUT PROGRAM.
DO REPEAT h = h0 h1 h2 h3 / x = 0 1 2 3 .
COMPUTE h = t.
END REPEAT. 
END INP PRO.

I have a patch almost ready that fixes this and does a good bit of general
cleanup to DO REPEAT.

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