Hi,
I got Guile to segfault in srfi-37.
Here’s a Guile script:
--8<---------------cut here---------------start------------->8---
#!/run/current-system/profile/bin/guile \
--no-auto-compile
!#
(use-modules (srfi srfi-1) (srfi srfi-37) (ice-9 match))
(define %options
(list (option '("greet") #t #f
(lambda (opt name arg result)
(alist-cons 'greet arg
(alist-delete 'greet result))))))
(define %default-options
`((greet . "hello")))
(define (parse-options args)
(args-fold
args %options
(lambda (opt name arg result)
(pk 'unrecognized)
(error "unrecognized option" name))
(lambda (arg result)
(pk 'extraneous)
(error "extraneous argument" arg))
%default-options))
(match (pk 'args (program-arguments))
((_ . rest)
(let ((config (parse-options rest)))
(pk 'no-segfault)))
(_
(pk 'usage)))
--8<---------------cut here---------------end--------------->8---
And here is how to make it segfault:
--8<---------------cut here---------------start------------->8---
./segfault.scm --greet=no --oh=crud
;;; (args ("./segfault.scm" "--greet=no" "--oh=crud"))
;;; (unrecognized)
Backtrace:
4 (primitive-load "/path/to/./segfault.scm")
In ice-9/eval.scm:
293:34 3 (_ #(#(#(#(#<directory (guile-user) 7fee48518c80>
("./segfault.scm" "--greet=no" "--oh=crud")) #<procedure failure ()>)
"./segfault.scm" …) …))
In srfi/srfi-37.scm:
113:18 2 (next-arg)
In unknown file:
1 Segmentation fault
--8<---------------cut here---------------end--------------->8---
Looks like using ERROR in ARGS-FOLD leads to a segfault.
--
Ricardo
