GC bug solved. Now new objects should work completely.
tree4725136f2f19a6c5bfab6982ef2baacceeb3df54
-rw-r--r-- 9830 library.scm
-rw-r--r-- 55841 picobit-vm.c
-rw-r--r-- 104062 picobit.scm
-rw-r--r-- 388 red-green.scm
-rw-r--r-- 31589 robot.scm