repl-print procedure calls
(write val), which is
inadequate for images, even very small images4. Fortunately, Guile
provides us both a simple mechanism to alter the default repl printer
and the alternate repl printer procedure we need:
To modify the default repl printer, you have to modify your
$HOME/.guile or, if you are working in a multi-user environmet,
you may choose to add (or modify if it exists) the file named
init.scm in the so-called Guile global site
directory5, here (evaluate the following expression in a
guile -c "(display (%global-site-dir))(newline)".
Which ever solution you choose, add the following lines:
(use-modules (ice-9 pretty-print) (system repl common)) (repl-default-option-set! 'print (lambda (repl obj) (truncated-print obj) (newline)))
Even for very small images, using write is inadequate, in a terminal, and will definitely kill your Emacs/Geiser session. Not to mention it will raise your electricity bill :) - till you succeed to delete its process, Emacs will use one core at more then 100%, desperately trying to display hundreds of thousands of floating point values, heating your laptop (if you have a laptop) up to the point you’ll be able to cook an egg on it, and get its fans crasy... You’ve been warned :).
You need write privileges to add or modify this file, contact your system administrator if you’re not in charge of the system you are working on.