[CM] determining existence of function

[Terrence Brannon]

I defined the function row->matrix via C-x C-e and then went to the Listener and
attempted to verify that I did by typing row->matrix into the Listener window.
With most Schemes I have used, I get something like:
#<function row->matrix>

But with guile-scheme I got this:

CM[1]>
CM[2]>
CM[3]> row->matrix

*** - EVAL: variable ROW->MATRIX has no value
The following restarts are available:
STORE-VALUE    :R1      You may input a new value for ROW->MATRIX.
USE-VALUE      :R2      You may input a value to be used instead of ROW->MATRIX.

*** - UNIX error 13 (EACCES): Permission denied
The following restarts are available:
STORE-VALUE    :R1      You may input a new value for ROW->MATRIX.
USE-VALUE      :R2      You may input a value to be used instead of ROW->MATRIX.

Break 1 CM[4]> (pprint (row->matrix albans-row))

((0 3 7 11 2 5 9 1 4 6 8 10) (9 0 4 8 11 2 6 10 1 3 5 7)
   (5 8 0 4 7 10 2 6 9 11 1 3) (1 4 8 0 3 6 10 2 5 7 9 11)
   (10 1 5 9 0 3 7 11 2 4 6 8) (7 10 2 6 9 0 4 8 11 1 3 5)
   (3 6 10 2 5 8 0 4 7 9 11 1) (11 2 6 10 1 4 8 0 3 5 7 9)
   (8 11 3 7 10 1 5 9 0 2 4 6) (6 9 1 5 8 11 3 7 10 0 2 4)
   (4 7 11 3 6 9 1 5 8 10 0 2) (2 5 9 1 4 7 11 3 6 8 10 0))

Break 1 CM[4]>

====
the fact that I can run the function implies that the C-x C-e on the function
definition did in fact define it. However, I do not understand why I could test
for the existence of the function by typing it into the REPL.