Chicken 2.5

From the Chicken web page:

CHICKEN is a compiler for the Scheme programming language. CHICKEN produces portable, efficient C, supports almost all of the current Scheme language standard, R5RS and includes many enhancements and extensions. CHICKEN runs on MacOS X, Windows, and many Unix flavours.

To reproduce my results on Ubuntu Gutsy Gibbon, install Chicken with

sudo apt-get install chicken-bin

and then install the syntax-case extension with

sudo chicken-setup syntax-case

Then run the interpreter with

csi -case-insensitive -no-warnings -R syntax-case -:c -:hm10000000 2>&1

N.B. The Chicken documentation claims that Chicken supports the numeric tower via the numbers extension, but I have been unable to install that.

Chicken makes the following choices: