In XEmacs 21.2 (beta20) "Yoko" [Lucid] (i686-pc-linux, Mule) of Wed Nov 10 1999 on ulysses.jprc.com configured using `configure --prefix=/home/xemacs/debug --with-mule --site-libraries=/home/xemacs/lib --site-includes=/home/xemacs/include --site-runtime-libraries=/home/xemacs/lib '--cflags=-g -Wall -Wno-switch' --with-dialogs=athena --with-widgets=athena' When gutters are visible, changing buffers (including going into the minibuffer via M-x or M-:) resets the match-data. This makes it impossible to interactively debug emacs-lisp code. My test is start xemacs -vanilla, in the *scratch* buffer enter the text (match-data t) then press C-x 2 C-a C-s data C-e C-x C-e to split the window and search for "data"; you'll see "(205 209)" in the minibuffer. Now press C-x o C-x C-e and you'll see "(0 1)" in the minibuffer. If you make the gutters invisible and repeat, you'll get the same expression "(205 209)" in the minibuffer from both views of *scratch* uname -a: Linux ulysses.jprc.com 2.2.12 #1 SMP Wed Sep 8 17:41:43 EDT 1999 i686 unknown ../xemacs-21.2.20/configure '--prefix=/home/xemacs/debug' '--with-mule' '--site-libraries=/home/xemacs/lib' '--site-includes=/home/xemacs/include' '--site-runtime-libraries=/home/xemacs/lib' '--cflags=-g -Wall -Wno-switch' '--with-dialogs=athena' '--with-widgets=athena' XEmacs 21.2-b20 "Yoko" configured for `i686-pc-linux'. Where should the build process find the source code? /home/xemacs/build/xemacs-21.2.20 What installation prefix should install use? /home/xemacs/debug What operating system and machine description files should XEmacs use? `s/linux.h' and `m/intel386.h' What compiler should XEmacs be built with? gcc -g -Wall -Wno-switch Should XEmacs use the GNU version of malloc? yes (Using Doug Lea's new malloc from the GNU C Library.) Should XEmacs use the relocating allocator for buffers? yes What window system should XEmacs use? x11 Where do we find X Windows header files? /usr/X11R6/include Where do we find X Windows libraries? /usr/X11R6/lib Additional header files: /home/xemacs/include Additional libraries: /home/xemacs/lib Runtime library search path: /home/xemacs/lib Compiling in support for XAUTH. Compiling in support for XPM images. Compiling in support for PNG image handling. Compiling in support for (builtin) GIF image handling. Compiling in support for JPEG image handling. Compiling in support for TIFF image handling. Compiling in support for X-Face message headers. Compiling in native sound support. Compiling in support for Berkeley DB. Compiling in support for GNU DBM. Compiling in support for ncurses. Compiling in support for GPM (General Purpose Mouse). Compiling in Mule (multi-lingual) support. Compiling in XIM (X11R5+ I18N input method) support. Using raw Xlib to provide XIM support. Compiling in support for proper WM_COMMAND handling. Using Lucid menubars. Using Lucid scrollbars. Using Athena native widgets. Using Athena dialog boxes. Compiling in DSO module support. movemail will use "dot-locking" for locking mail spool files. Compiling in extra code for debugging. 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: ---------------------------------------------------------