Here are two stack backtraces illustrating how XEmacs can get SIGPIPE on Unix. The first backtrace is from a gdb> prompt, the second is after a `cont' command. The third attachment is the Installation file for the build. I'm still working on a short test case. `unix_send_process' is clearly foobar'ed, at least for me. uname -a: Linux altair.xemacs.org 2.0.34 #1 Wed Jun 3 23:15:41 PDT 1998 i586 /home/xemacs/xemacs-20.0/configure '--with-gnu-make' '--srcdir=/home/xemacs/xemacs-20.0' '--cflags=-g' '--error-checking=all' '--debug=yes' '--with-mule=yes' '--with-dialogs=athena3d' '--with-scrollbars=athena3d' '--with-xim=xlib' '--mail-locking=file' '--extra-verbose=yes' '--use-union-type=yes' '--with-xfs=yes' '--with-pop=no' '--with-toolbars=yes' '--compiler=pgcc' XEmacs 21.0 "Erzgeberg-pre1" configured for `i586-pc-linux'. Where should the build process find the source code? /home/xemacs/xemacs-20.0 What installation prefix should install use? /usr/local What operating system and machine description files should XEmacs use? `s/linux.h' and `m/intel386.h' What compiler should XEmacs be built with? pgcc -g 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/X11/include Where do we find X Windows libraries? /usr/X11/lib Compiling in support for XAUTH. Compiling in support for XPM images. Compiling in support for PNG image handling. Compiling in support for X-Face message headers. Compiling in support for (builtin) GIF image handling. Compiling in support for JPEG image handling. Compiling in support for TIFF image handling. 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. Using XFontSet to provide bilingual menubar. Compiling in support for Canna on Mule. Compiling in support for the WNN input method on Mule. Using WNN version 6. Compiling in support for proper session-management. Using Lucid menubars. Using Athena-3d scrollbars. Using Athena-3d dialog boxes. Compiling in DLL support. movemail will use "dot-locking" for locking mail spool files. Using the union type for Lisp_Objects. Using Lisp_Objects with minimal tagbits. Compiling in extra code for debugging. Compiling in code for checking XEmacs memory usage. 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: ---------------------------------------------------------