[Chicken-janitors] #493: set! returns its value when compiled

[Chicken Trac]

#493: set! returns its value when compiled
----------------------+-----------------------------------------------------
 Reporter:  zbigniew  |       Owner:       
     Type:  defect    |      Status:  new  
 Priority:  minor     |   Milestone:  4.7.0
Component:  compiler  |     Version:  4.6.x
 Keywords:            |  
----------------------+-----------------------------------------------------
 I guess this has been true for a while (it is in 4.5.5 and 4.6.4).  It
 causes some light breakage, like if you use (display ...) on a TCP port,
 display will sometimes return the empty string instead of void, since
 there is a (set!) as the final statement in the output port lambda.  So, I
 assume this is unintentional.

 {{{
 echo "(print (set! a 3))" > set.scm

 csc set.scm
 ./set
 3

 csi -script set.scm
 #<unspecified>
 }}}

-- 
Ticket URL: <http://bugs.call-cc.org/ticket/493>
Chicken Scheme <http://www.call-with-current-continuation.org/>
Chicken Scheme is a compiler for the Scheme programming language.