12:39 a.m.
================================================================
Dear Bug Team!
I get a "Cannot switch buffers in minibuffer window" error message
when I do the following. I can reproduce this at will with 'xemacs -q'.
1. Start with a single buffer.
2. Do 'C-x 2'
3. Go to the bottom buffer.
4. Do 'C-x 3'
5. Go the right hand side buffer.
6. Do 'C-x b' (switch-to-buffer here). Give any buffer name or even
'RET' for the default choice.
I see the following error:
Signaling: (error "Cannot switch buffers in minibuffer window")
signal(error ("Cannot switch buffers in minibuffer window"))
cerror("Cannot switch buffers in minibuffer window")
apply(cerror "Cannot switch buffers in minibuffer window" nil)
error("Cannot switch buffers in minibuffer window")
switch-to-buffer("*Backtrace*")
call-interactively(switch-to-buffer)
(dispatch-event "[internal]")
I am not sure what other information would be useful. Please let me
know and I can get it (since I can reproduce this at will). Thanks.
kaarthik
================================================================
System Info to help track down your bug:
---------------------------------------
uname -a: FreeBSD the-saint 4.7-STABLE FreeBSD 4.7-STABLE #0: Wed May 7 22:47:54 EDT 2003
kaarthik＠the-saint:/usr/src/sys/compile/THE-SAINT i386
./configure '--site-includes=/usr/local/include'
'--site-libraries=/usr/local/lib' '--with-database=no'
'--with-dialogs=athena' '--with-widgets=athena' '--with-athena=3d'
'--pdump' '--with-pop' '--with-xface'
XEmacs 21.5-b13 "cauliflower" (+CVS-20030510) configured for
`i386-unknown-freebsd4.7'.
Compilation / Installation:
Source code location: /usr/home/kaarthik/xemacs/xemacs-21.5
Installation prefix: /usr/local
Additional header files: /usr/local/include
Additional libraries: /usr/local/lib
Runtime library search path: /usr/local/lib:/usr/X11R6/lib
Operating system description file: `s/freebsd.h'
Machine description file: `m/intel386.h'
Compiler: gcc -Wall -Wno-switch -Winline -Wmissing-prototypes
-Wsign-compare -Wundef -Wstrict-prototypes -Wshadow -Wmissing-declarations -Wpointer-arith
-g -O3
Relocating allocator for buffers: yes
GNU version of malloc: yes
Window System:
Compiling in support for the X window system:
- X Windows headers location: /usr/X11R6/include
- X Windows libraries location: /usr/X11R6/lib
- Handling WM_COMMAND properly.
Compiling in support for the Athena widget set:
- Athena headers location: X11/Xaw3d
- Athena library to link: Xaw3d
Using Lucid menubars.
Using Lucid scrollbars.
Using Athena dialog boxes.
Using Athena native widgets.
TTY:
Compiling in support for ncurses.
Images:
Compiling in support for GIF images (builtin).
Compiling in support for XPM images.
Compiling in support for PNG images.
Compiling in support for JPEG images.
Compiling in support for TIFF images.
Compiling in support for X-Face message headers.
Sound:
Compiling in support for sound (native).
Databases:
Internationalization:
Mail:
Compiling in support for POP mail retrieval.
Compiling in support for "flock" mail spool file locking method.
Other Features:
Inhibiting IPv6 canonicalization at startup.
Compiling in support for dynamic shared object modules.
Using the new portable dumper.
Compiling in support for extra debugging code.
WARNING: ---------------------------------------------------------
WARNING: Compiling in support for runtime error checking.
WARNING: XEmacs will run noticeably more slowly as a result.
WARNING: Error checking is on by default for XEmacs beta releases.
WARNING: ---------------------------------------------------------
Load-Path Lisp Shadows:
----------------------
(/home/kaarthik/.xemacs/elisp/ps-print/lisp/ps-print
/usr/local/lib/xemacs/xemacs-packages/lisp/ps-print/ps-print
/home/kaarthik/.xemacs/elisp/ps-print/lisp/ps-mule
/usr/local/lib/xemacs/xemacs-packages/lisp/ps-print/ps-mule
/home/kaarthik/.xemacs/elisp/ps-print/lisp/ps-bdf
/usr/local/lib/xemacs/xemacs-packages/lisp/ps-print/ps-bdf
/home/kaarthik/.xemacs/elisp/cparse/sformat
/usr/local/lib/xemacs/xemacs-packages/lisp/semantic/sformat
/home/kaarthik/.xemacs/elisp/newcomment
/home/kaarthik/xemacs/xemacs-21.5/lisp/newcomment
/usr/local/lib/xemacs/xemacs-packages/lisp/build/build-report
/home/kaarthik/xemacs/xemacs-21.5/lisp/build-report)
Installed XEmacs Packages:
-------------------------
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Installed Modules:
-----------------
Features:
--------
(xemacsbug shadow gnus-uu bbdb-gui bbdb-hooks sort gnus-cite smiley
annotations gnus-async gnus-bcklg gnus-dup gnus-ml mailcrypt
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edmacro advice advice-preload uniquify savehist time redo recent-files
paren mic-paren timer icomplete func-menu detached-minibuf backup-dir
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mail-abbrevs sendmail rfc822 bbdb timezone tex-toolbar tex-site mwheel
gnuserv zenirc-autoloads xslt-process-autoloads xslide-autoloads
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vhdl-autoloads vc-cc-autoloads vc-autoloads tramp-autoloads
tpu-autoloads tooltalk-autoloads tm-autoloads time-autoloads
textools-autoloads text-modes-autoloads texinfo-autoloads
supercite-autoloads strokes-autoloads speedbar-autoloads
sounds-wav-autoloads sounds-au-autoloads sml-mode-autoloads
slider-autoloads sieve-autoloads sh-script-autoloads sgml-autoloads
semantic-autoloads scheme-autoloads sasl-autoloads
ruby-modes-autoloads rmail-autoloads reftex-autoloads
python-modes-autoloads psgml-dtds-autoloads psgml-autoloads
ps-print-autoloads prog-modes-autoloads pgg-autoloads
perl-modes-autoloads pcomplete-autoloads pcl-cvs-autoloads
pc-autoloads os-utils-autoloads ocaml-autoloads net-utils-autoloads
mmm-mode-autoloads misc-games-autoloads mine-autoloads mh-e-autoloads
mew-autoloads mailcrypt-autoloads mail-lib-autoloads liece-autoloads
jde-autoloads ispell-autoloads ilisp-autoloads igrep-autoloads
idlwave-autoloads ibuffer-autoloads hm--html-menus-autoloads
haskell-mode-autoloads gnus-autoloads gnats-autoloads games-autoloads
fsf-compat-autoloads frame-icon-autoloads fortran-modes-autoloads
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ess-autoloads eshell-autoloads emerge-autoloads elib-autoloads
eieio-autoloads efs-autoloads edt-autoloads edit-utils-autoloads
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debug-autoloads crisp-autoloads cookie-autoloads clearcase-autoloads
cc-mode-autoloads calendar-autoloads calc-autoloads
c-support-autoloads build-autoloads bbdb-autoloads auctex-autoloads
apel-autoloads ada-autoloads modules-autoloads auto-autoloads loadhist
rsz-minibuf auto-show fontl-hooks x-iso8859-1 code-cmds gutter-items
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c-balloon-help tty-frames tty toolbar native-sound scrollbar
unix-processes multicast network-streams subprocesses modules
menu-accelerator-support menubar md5 xemacs gutter tiff png gif jpeg
xface xpm xbm lisp-float-type file-coding berkeley-unix dialog devices
window-system base64)
Recent keystrokes:
-----------------
C-x 3 C-TAB C-x b RET C-g C-g C-g C-] C-TAB C-TAB C-x
3 C-TAB C-x b RET C-x k RET C-x b RET C-x k RET C-x
0 misc-user misc-user C-x 2 C-TAB C-x C-g C-g C-g C-g
C-x k RET C-] C-] C-] C-] C-] C-] C-] C-] C-] C-TAB
C-x 1 C-x 2 C-TAB C-x 3 C-TAB C-x b RET C-p C-SPC C-n
C-n C-n C-n C-n C-n C-n C-n M-w C-TAB f3 n y n SPC
SPC q M-x r e p o r t - e m a c s - b u g RET
Recent messages (most recent first):
-----------------------------------
Starting new Ispell process...
Parsing /home/kaarthik/.mailrc... done
Parsing /home/kaarthik/.mail_aliases... done
Parsing /home/kaarthik/.mail_aliases...
Parsing /home/kaarthik/.mailrc...
Loading xemacsbug...done
Loading xemacsbug...
Loading gnus-uu...done
Loading gnus-uu...
Loading bbdb-gui...done
Loading bbdb-gui...
Updating of BBDB records finished
Loading bbdb-hooks...done
Loading bbdb-hooks...
Loading gnus-cite...done
Loading gnus-cite...
Loading smiley...done
Loading smiley...
Loading gnus-async...done
Loading gnus-async...
11:59 p.m.
Kaarthik Sivakumar <kaarthik(a)comcast.net> wrote:
I get a "Cannot switch buffers in minibuffer window" error
message
when I do the following. I can reproduce this at will with 'xemacs -q'.
1. Start with a single buffer.
2. Do 'C-x 2'
3. Go to the bottom buffer.
4. Do 'C-x 3'
5. Go the right hand side buffer.
6. Do 'C-x b' (switch-to-buffer here). Give any buffer name or even
'RET' for the default choice.
I see the following error:
Signaling: (error "Cannot switch buffers in minibuffer window")
signal(error ("Cannot switch buffers in minibuffer window"))
cerror("Cannot switch buffers in minibuffer window")
apply(cerror "Cannot switch buffers in minibuffer window" nil)
error("Cannot switch buffers in minibuffer window")
switch-to-buffer("*Backtrace*")
call-interactively(switch-to-buffer)
(dispatch-event "[internal]")
This seems to be related to Nickolay Pakoulin's later message, entitled
"[21.5] [BUG] save/restore window configuration". After creating these
three windows, "C-x b" ultimately causes a call to read-from-minibuffer.
That function sets oconfig to the value of
(current-window-configuration) before doing its work, then evaluates
(set-window-configuration oconfig) just before returning. However, the
set-window-configuration call fails to do the right thing. It creates
two windows instead of three, and then selects the minibuffer as the
current window, resulting in the error reported above.
Try this:
1. Start xemacs with -q
2. C-x 2
3. C-x o
4. C-x 3
5. C-x o
6. (setq my-config (current-window-configuration)) C-j
7. C-x 1
8. (set-window-configuration my-config) C-j
At this point, there are 2 windows showing *scratch*, and the cursor is
in the (empty) minibuffer. Further experiments show that
set-window-configuration works correctly with two windows, whether split
horizontally or vertically, but if I make 4 windows by doing C-x 2 and
then splitting the top and bottom both with C-x 3, then
set-window-configuration does this:
_____________________________________
| | |
| | |
| | |
| | |
_____________________________________
| |
| |
| |
| |
_____________________________________
and once again puts point into the minibuffer. It looks like
set-window-configuration can't handle having the bottom window split.
--
Jerry James
http://www.ittc.ku.edu/~james/
4:40 a.m.
>> "JJ" == Jerry James <james(a)xemacs.org>
writes:
JJ> This seems to be related to Nickolay Pakoulin's later message,
entitled
JJ> "[21.5] [BUG] save/restore window configuration". After creating these
JJ> three windows, "C-x b" ultimately causes a call to read-from-minibuffer.
JJ> That function sets oconfig to the value of
JJ> (current-window-configuration) before doing its work, then evaluates
JJ> (set-window-configuration oconfig) just before returning. However, the
JJ> set-window-configuration call fails to do the right thing. It creates
JJ> two windows instead of three, and then selects the minibuffer as the
JJ> current window, resulting in the error reported above.
JJ> Try this:
JJ> 1. Start xemacs with -q
JJ> 2. C-x 2
JJ> 3. C-x o
JJ> 4. C-x 3
JJ> 5. C-x o
JJ> 6. (setq my-config (current-window-configuration)) C-j
JJ> 7. C-x 1
JJ> 8. (set-window-configuration my-config) C-j
Yep I see this as you point out. There are only 2 windows now showing
the *scratch* buffer and the cursor is in the minibuffer.
JJ> At this point, there are 2 windows showing *scratch*, and the cursor is
JJ> in the (empty) minibuffer. Further experiments show that
JJ> set-window-configuration works correctly with two windows, whether split
JJ> horizontally or vertically, but if I make 4 windows by doing C-x 2 and
JJ> then splitting the top and bottom both with C-x 3, then
JJ> set-window-configuration does this:
[...]
JJ> and once again puts point into the minibuffer. It looks like
JJ> set-window-configuration can't handle having the bottom window split.
And this also. So is there a solution to this? If there are any
suggestions I can help with trying them out.
Kaarthik
5:35 p.m.
New subject: [PATCH21.5] Problem with switching buffers after splitting window
Kaarthik Sivakumar <kaarthik(a)comcast.net> wrote:
Yep I see this as you point out. There are only 2 windows now
showing
the *scratch* buffer and the cursor is in the minibuffer.
[snip]
And this also. So is there a solution to this? If there are any
suggestions I can help with trying them out.
Okay, I see the problem. In the function restore-saved-window (in
window-xemacs.el), the first-hchild and first-vchild links of a given
window are only followed if the next-child link is non-nil. But if you
look at the structure you get from current-window-configuration with the
3-window setup, you'll see windows with a null next-child and non-null
first-hchild or first-vchild links. So it looks like the patch below is
the correct fix. I've just tried every experiment I could think of with
this patch in place, and they all worked. I'll commit this in a day or
two if nobody objects.
Index: lisp/ChangeLog
===================================================================
RCS file: /pack/xemacscvs/XEmacs/xemacs/lisp/ChangeLog,v
retrieving revision 1.514
diff -d -u -r1.514 ChangeLog
--- lisp/ChangeLog 2003/07/06 18:12:33 1.514
+++ lisp/ChangeLog 2003/07/16 16:30:06
＠＠ -1,3 +1,8 ＠＠
+2003-07-16 Jerry James <james(a)xemacs.org>
+
+ * window-xemacs.el (restore-saved-window): Follow first-hchild and
+ first-vchild links even when next-child is nil.
+
2003-07-06 Adrian Aichner <adrian(a)xemacs.org>
* package-get.el (package-get-package-index-file-location): Handle
Index: lisp/window-xemacs.el
===================================================================
RCS file: /pack/xemacscvs/XEmacs/xemacs/lisp/window-xemacs.el,v
retrieving revision 1.17
diff -d -u -r1.17 window-xemacs.el
--- lisp/window-xemacs.el 2003/03/26 15:09:51 1.17
+++ lisp/window-xemacs.el 2003/07/16 16:28:05
＠＠ -345,29 +345,28 ＠＠
(defun restore-saved-window (configuration window saved-window direction)
"Within CONFIGURATION, restore WINDOW to the state of SAVED-WINDOW."
- (if (saved-window-next-child saved-window)
- (progn
- (if (not (saved-window-minibufferp (saved-window-next-child saved-window)))
- (progn
- (cond ((eq direction 'vertical)
- (split-window window nil nil))
- ((eq direction 'horizontal)
- (split-window window nil t)))
- (restore-saved-window configuration
- (window-next-child window)
- (saved-window-next-child saved-window)
- direction)))
+ (and (saved-window-next-child saved-window)
+ (not (saved-window-minibufferp (saved-window-next-child saved-window)))
+ (progn
+ (cond ((eq direction 'vertical)
+ (split-window window nil nil))
+ ((eq direction 'horizontal)
+ (split-window window nil t)))
+ (restore-saved-window configuration
+ (window-next-child window)
+ (saved-window-next-child saved-window)
+ direction)))
- (if (saved-window-first-hchild saved-window)
- (restore-saved-window configuration
- window
- (saved-window-first-hchild saved-window)
- 'horizontal))
- (if (saved-window-first-vchild saved-window)
- (restore-saved-window configuration
- window
- (saved-window-first-vchild saved-window)
- 'vertical))))
+ (if (saved-window-first-hchild saved-window)
+ (restore-saved-window configuration
+ window
+ (saved-window-first-hchild saved-window)
+ 'horizontal))
+ (if (saved-window-first-vchild saved-window)
+ (restore-saved-window configuration
+ window
+ (saved-window-first-vchild saved-window)
+ 'vertical))
(if (not (saved-window-minibufferp saved-window))
(restore-saved-window-parameters configuration window saved-window)))
--
Jerry James
http://www.ittc.ku.edu/~james/
8:27 a.m.
New subject: [A] Problem with switching buffers after splitting window
Looks good to me. (I must say that I do dislike using boolean
operators as control structures, through ...)
+ (and (saved-window-next-child saved-window)
+ (not (saved-window-minibufferp (saved-window-next-child saved-window)))
+ (progn
Thanks for looking into this!
--
Cheers =8-} Mike
Friede, Völkerverständigung und überhaupt blabla
3:44 p.m.
New subject: [C21.5] Problem with switching buffers after splitting window
COMMIT 21.5
Michael Sperber <sperber(a)informatik.uni-tuebingen.de> wrote:
Looks good to me. (I must say that I do dislike using boolean
operators as control structures, through ...)
The professor I first learned Lisp from was enamored of such tricks. I
guess he rubbed off on me. I can certainly wrap that in an `if' if you
like.
--
Jerry James
http://www.ittc.ku.edu/~james/
3:47 p.m.
New subject: [A] Problem with switching buffers after splitting window
>>>> "ms" == Michael Sperber
<sperber(a)informatik.uni-tuebingen.de> writes:
ms> Looks good to me. (I must say that I do dislike using boolean
ms> operators as control structures, through ...)
Tee hee. Actually, I like the idiom (but then, I think of them as
control structures in the first place, since they short-circuit).
Anyway, if you're gonna call in the type-safety police, you'd have to
write that
(and (not (null (saved-window-next-child saved-window)))
(not (saved-window-minibufferp (saved-window-next-child saved-window)))
(progn
Bletch.
--
Institute of Policy and Planning Sciences http://turnbull.sk.tsukuba.ac.jp
University of Tsukuba Tennodai 1-1-1 Tsukuba 305-8573 JAPAN
Ask not how you can "do" free software business;
ask what your business can "do for" free software.
7:30 p.m.
New subject: [A] Problem with switching buffers after splitting window
>>>> "Stephen" == Stephen J Turnbull
<stephen(a)xemacs.org> writes:
>>>> "ms" == Michael Sperber
<sperber(a)informatik.uni-tuebingen.de> writes:
ms> Looks good to me. (I must say that I do dislike using boolean
ms> operators as control structures, through ...)
Stephen> Tee hee. Actually, I like the idiom (but then, I think of them as
Stephen> control structures in the first place, since they short-circuit).
Stephen> Anyway, if you're gonna call in the type-safety police, you'd have to
Stephen> write that
Type-safety police? Frickin' TYPE-SAFETY POLICE? ME? I know people
from the TYPE-SAFETY POLICE who'd just as soon arrest me on sight.
You must be dreaming ...
--
Cheers =8-} Mike
Friede, Völkerverständigung und überhaupt blabla
8:46 a.m.
New subject: [A] Problem with switching buffers after splitting window
>>>> "ms" == Michael Sperber
<sperber(a)informatik.uni-tuebingen.de> writes:
ms> Type-safety police? Frickin' TYPE-SAFETY POLICE? ME? I know
ms> people from the TYPE-SAFETY POLICE who'd just as soon arrest
ms> me on sight. You must be dreaming ...
Ah, now that could be useful information if I'm ever short a Euro....
--
Institute of Policy and Planning Sciences http://turnbull.sk.tsukuba.ac.jp
University of Tsukuba Tennodai 1-1-1 Tsukuba 305-8573 JAPAN
Ask not how you can "do" free software business;
ask what your business can "do for" free software.
7:33 p.m.
New subject: [PATCH21.5] Problem with switching buffers after splitting window
>> "JJ" == Jerry James <james(a)xemacs.org>
writes:
JJ> Okay, I see the problem. In the function restore-saved-window (in
JJ> window-xemacs.el), the first-hchild and first-vchild links of a given
JJ> window are only followed if the next-child link is non-nil. But if you
JJ> look at the structure you get from current-window-configuration with the
JJ> 3-window setup, you'll see windows with a null next-child and non-null
JJ> first-hchild or first-vchild links. So it looks like the patch below is
JJ> the correct fix. I've just tried every experiment I could think of with
JJ> this patch in place, and they all worked. I'll commit this in a day or
JJ> two if nobody objects.
I CVSup-ed this fix and it works well now. Thanks..
Kaarthik
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9 comments
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participants (4)
-
Jerry James -
Kaarthik Sivakumar -
Michael Sperber -
Stephen J. Turnbull