[Chicken-hackers] Feature request: make cond more resilient against misuse

[Jörg F . Wittenberger]

Hi all,

admitt this is a case of garbage-in-garbage out.

A `cond` (or `case`) expression with an `else` branch behaves odd when an 
empty sequence of expression is given in the `else` branch: it results in 
an unbound variable "else" at runtime.

Attached a test case.  Try

$ csc unboundvariableelse.scm
$ ./unboundvariableelse

Best

/Jörg

unboundvariableelse.scm
Description: unboundvariableelse.scm