21.1.7 crashes without '--use-system-malloc' on solaris 2.5

I had some problems to get XEmacs 21.1.7 running on solaris 2.5. XEmacs compiled fine, but until I finally configured with '--use-system-malloc', XEmacs always crashed immediately (Segmentation fault) when I tried to start it using X-Windows. There was no lisp-backtrace. gdb said the core-file was truncated and couldn't produce a C-backtrace. `xemacs -nw' in a xterm worked OK, even without the configure option '--use-system-malloc'. With the configure option '--use-system-malloc' everything seems to be OK. Mike fabian＠mungo ~/usr/src/xemacs-cvs$ cat Installation uname -a: SunOS mungo 5.5.1 Generic_103640-24 sun4u sparc SUNW,Ultra-2 ./configure '--prefix=/dvs/stow/xemacs-21.1.7' '--with-pop' '--with-dialogs=athena' '--with-mule=yes' '--cflags=-g -O4 -fno-strength-reduce' '--with-xface=yes' '--with-canna=yes' '--site-includes=/dvs/local/include /dvs/include' '--site-libraries=/dvs/local/lib /dvs/lib' '--site-prefixes=/dvs/local /dvs' '--use-system-malloc' XEmacs 21.1.7 "Biscayne" configured for `sparc-sun-solaris2.5.1'. Where should the build process find the source code? /disk-a/fabian/usr/src/xemacs-cvs What installation prefix should install use? /dvs/stow/xemacs-21.1.7 What operating system and machine description files should XEmacs use? `s/sol2.h' and `m/sparc.h' What compiler should XEmacs be built with? gcc -g -O4 -fno-strength-reduce Should XEmacs use the GNU version of malloc? no (User chose not to use GNU allocators). 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/dt/include /usr/openwin/include Where do we find X Windows libraries? /usr/dt/lib /usr/openwin/lib Additional header files: /dvs/local/include /dvs/include Additional libraries: /dvs/local/lib /dvs/lib Additional prefixes: /dvs/local /dvs Runtime library search path: /usr/ccs/lib:/dvs/lib:/usr/dt/lib:/usr/openwin/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 X-Face message headers. Compiling in native sound support. Compiling in support for DBM. Compiling in Mule (multi-lingual) support. Compiling in XIM (X11R5+ I18N input method) support. Using Motif to provide XIM support. Compiling in support for Canna on Mule. Compiling in support for ToolTalk. Compiling in support for proper session-management. Using Lucid menubars. Using Lucid scrollbars. Using Athena dialog boxes. Compiling in DLL support. movemail will use "dot-locking" for locking mail spool files. Using POP for mail access fabian＠mungo ~/usr/src/xemacs-cvs$ -- Dr. Mike Fabian <fabian(a)mpia-hd.mpg.de&gt; Max-Planck-Institut fuer Astronomie, Koenigsstuhl 17, 69117 Heidelberg Telephone: +49(0)6221/528216