Re: tramp (2.2.3-24.1); 'Stack overflow in regexp matcher' when attempting remote dired on folder containing many files

[Michael Albinus]

Tom Roche <address@hidden> writes:

Hi Tom,

> address@hidden:~ $ find /project/this/that/emis/model_ready -maxdepth 1 | wc 
> -l
> 2637

Wow!

> Stack overflow in regexp matcher
>
> Please let me know if I should debug further, e.g., (setq tramp-verbose 9) -> 
> init.el, M-x tramp-cleanup-all-connections.

I could reproduce it (creating a temp directory with 5000 dummy
files). The following patch solves the problem for me:

--8<---------------cut here---------------start------------->8---
detlef:~> (cd src/emacs/lisp/net/ ; bzr diff --diff-options -c tramp.el)
=== modified file 'lisp/net/tramp.el'
*** lisp/net/tramp.el   2012-04-22 13:58:00 +0000
--- lisp/net/tramp.el   2012-06-01 13:02:09 +0000
***************
*** 3315,3322 ****
                     'buffer-substring-no-properties
                     1 (min (1+ tramp-echo-mark-marker-length) (point-max))))))
        ;; No echo to be handled, now we can look for the regexp.
!       (goto-char (point-min))
!       (re-search-forward regexp nil t))))
  
  (defun tramp-wait-for-regexp (proc timeout regexp)
    "Wait for a REGEXP to appear from process PROC within TIMEOUT seconds.
--- 3315,3328 ----
                     'buffer-substring-no-properties
                     1 (min (1+ tramp-echo-mark-marker-length) (point-max))))))
        ;; No echo to be handled, now we can look for the regexp.
!       ;; Sometimes, the buffer is much to huge, and we run into a
!       ;; "Stack overflow in regexp matcher".  For example, directory
!       ;; listings with some thousand files.  Therefore, we look from
!       ;; the end for the last line.  We ignore also superlong lines,
!       ;; like created with "//DIRED//".
!       (goto-char (point-max))
!       (unless (> (- (point) (point-at-bol)) 128)
!       (re-search-backward regexp (point-at-bol) t)))))
  
  (defun tramp-wait-for-regexp (proc timeout regexp)
    "Wait for a REGEXP to appear from process PROC within TIMEOUT seconds.
--8<---------------cut here---------------end--------------->8---

Thanks for the report, and best regards, Michael.