wrong type error in local variables

[Douglas Lewan]

I have a TeX file with the following local variables:

    Local Variables:
    eval: (ab-new-buffer (prog1 (find-file "chapter16.tex") (message "After find 
file.")))
    End:

The (find-file) succeeds. (There's a buffer with that file and I see the 
message.) However, overall I get this error:

    File local-variables error: (wrong-type-argument stringp nil)

I assume the call to (ab-new-buffer) gets the error, but as far as I can 
tell that call never happens. (ab-new-buffer) has the following definition:

    (defun ab-new-buffer (buffer-or-name)
      (error "Now in (ab-new-buffer)."))

I never see that error.
What am I missing?

FYI The data above are obviously reduced to a minimal case. With the 
correct definition of (ab-new-buffer) a full battery of tests passes.

--
,Doug
d.lewan2000@gmail.com
(908) 720 7908

If this is what winning looks like, I'd hate to see what losing is.