stitch:~/code/ezd$ ./check -:D
[debug] application startup...
[debug] heap resized to 1048576 bytes
[debug] stack bottom is 0x7ffe9c5984c0.
[debug] entering toplevel toplevel...
[debug] entering toplevel library_toplevel...
[debug] entering toplevel build_2dversion_toplevel...
[debug] entering toplevel eval_toplevel...
[debug] entering toplevel expand_toplevel...
[debug] entering toplevel modules_toplevel...
[debug] entering toplevel chicken_2dsyntax_toplevel...
[debug] entering toplevel window_toplevel...
[debug] entering toplevel display_toplevel...
[debug] entering toplevel commands_toplevel...
[debug] entering toplevel drawing_toplevel...
[debug] entering toplevel view_toplevel...
[debug] entering toplevel graphic_toplevel...
[debug] entering toplevel ezd_toplevel...
[debug] entering toplevel events_toplevel...

Error: unbound variable: drawing-exists?

;; drawing-exists? is defined in the drawing unit!