; I want a function to be able to return a struct-by-val like this:

(foreign-lambda (struct "line") "foo" )

; My wrapper does this: 
; Allocate struct on stack and continue with continuation, returning address

(foreign-lambda* (c-pointer (struct "line")) () "struct line _tmp=foo();C_return(&_tmp);")

; When I run this once, twice, 10 times, it works all right.
; When I run it 100 times, the values become corrupted, as if something 
; gets eaten by chicken's GC. 

; What am I doing wrong?