Dear Slime-Developers,

in a project that involves heavy usage of UFFI (loading a library written in C++ with a C-header file using extern "C") I am encountering repeatable segmentation faults when working under SLIME.

An example session would be: -------------------------------------------------- M-x slime ,load-system cl-the-uffi-using-system (using tab completion and a symlink in my central registry) ,cd /path/to/another/lib/im/currently/workin/on

and the echo area tells me: Lisp connection closed unexpectedly: exited abnormally with code 256 --------------------------------------------------

The debugger output I get after C-g'ing is pasted below

A few more notes: * I am using CVS HEAD slime, XEmacs 21.4 (patch 17) and CMU Common Lisp CVS 19b 19b-release-20050628-3 + minimal debian patches (19B) on Gentoo/x86. SLIME ist not emerged but manually kept in sync with CVS. * I can't tell for sure that there are no problems with the C-lib. But I'd expect those problems to show up when calling the functions not after loading the system and doing a simple directory change. * I have double checked the UFFI-function definitions and the C-header file. That should be correct. * Currently I can't change the C-library at all, but when the author will be back from his holiday we can change everything there. * Unfortunately I can't provide the source, it's an inhouse project of my employer (although we released one part of it under BSD license recently :-). * I can't crash it easily with SBCL 0.9.4. * And, well, it works when running CMUCL from the shell. That's why I am writing to this list in hope of some enlightenment.

Of course I'd be happy if you'd say: "ah, this is a bug, I just uploaded a patch", but any pointer as to where and how I might get more information will be appreciated.

Kind Regards Stefan Kamphausen

PS: Funny enough, I had some problems sending to this list due to greylisting and just at that moment martin wrote his somewhat similar message.

---------------------------------------------------------------------- Debugger output: Debugger entered--Lisp error: (quit) accept-process-output(nil 0 10000) (while t (accept-process-output nil 0 10000)) (let ((debug-on-quit t) (inhibit-quit nil)) (while t (accept-process-output nil 0 10000))) (catch tag (slime-rex (tag sexp) (sexp package) ((:ok value) (unless (member tag slime-stack-eval-tags) (error "tag = %S eval-tags = %S sexp = %S" tag slime-stack-eval-tags sexp)) (throw tag (list (function identity) value))) ((:abort) (throw tag (list (function error) "Synchronous Lisp Evaluation aborted.")))) (let ((debug-on-quit t) (inhibit-quit nil)) (while t (accept-process-output nil 0 10000)))) (apply (function funcall) (catch tag (slime-rex (tag sexp) (sexp package) ((:ok value) (unless (member tag slime-stack-eval-tags) (error "tag = %S eval-tags = %S sexp = %S" tag slime-stack-eval-tags sexp)) (throw tag (list (function identity) value))) ((:abort) (throw tag (list (function error) "Synchronous Lisp Evaluation aborted.")))) (let ((debug-on-quit t) (inhibit-quit nil)) (while t (accept-process-output nil 0 10000))))) (let* ((tag (gensym "slime-result-")) (slime-stack-eval-tags (cons tag slime-stack-eval-tags))) (apply (function funcall) (catch tag (slime-rex (tag sexp) (sexp package) ((:ok value) (unless (member tag slime-stack-eval-tags) (error "tag = %S eval-tags = %S sexp = %S" tag slime-stack-eval-tags sexp)) (throw tag (list (function identity) value))) ((:abort) (throw tag (list (function error) "Synchronous Lisp Evaluation aborted.")))) (let ((debug-on-quit t) (inhibit-quit nil)) (while t (accept-process-output nil 0 10000)))))) slime-eval((swank:set-default-directory "/home/ska/prj/lisp/cl-meta-worker/")) (slime-from-lisp-filename (slime-eval (backquote (swank:set-default-directory (, (slime-to-lisp-filename directory)))))) (message "default-directory: %s" (slime-from-lisp-filename (slime-eval (backquote (swank:set-default-directory (, (slime-to-lisp-filename directory))))))) (lambda (directory) "Make DIRECTORY become Lisp's current directory." (interactive (list (read-directory-name "Directory: " nil nil t))) (message "default-directory: %s" (slime-from-lisp-filename (slime-eval (backquote (swank:set-default-directory (, (slime-to-lisp-filename directory))))))) (with-current-buffer (slime-output-buffer) (setq default-directory (expand-file-name directory)) (when (boundp (quote header-line-format)) (slime-repl-update-banner))))("~/prj/lisp/cl-meta-worker/") call-interactively(slime-set-default-directory) (let ((shortcut (slime-lookup-shortcut (completing-read "Command: " (slime-bogus-completion-alist (slime-list-all-repl-shortcuts)) nil t nil (quote slime-repl-shortcut-history))))) (call-interactively (slime-repl-shortcut.handler shortcut))) (if (save-excursion (goto-char slime-repl-input-start-mark) (looking-at " *$")) (let ((shortcut (slime-lookup-shortcut (completing-read "Command: " (slime-bogus-completion-alist (slime-list-all-repl-shortcuts)) nil t nil (quote slime-repl-shortcut-history))))) (call-interactively (slime-repl-shortcut.handler shortcut))) (insert (string slime-repl-shortcut-dispatch-char))) (lambda nil (interactive) (if (save-excursion (goto-char slime-repl-input-start-mark) (looking-at " *$")) (let ((shortcut (slime-lookup-shortcut (completing-read "Command: " (slime-bogus-completion-alist (slime-list-all-repl-shortcuts)) nil t nil (quote slime-repl-shortcut-history))))) (call-interactively (slime-repl-shortcut.handler shortcut))) (insert (string slime-repl-shortcut-dispatch-char))))() call-interactively(slime-handle-repl-shortcut)