- * Fixed problem on systems such as Sunos4 that do not support realloc
- on a NULL pointer; error was "out of memory in flist_expand".
+ * If configured with --enable-maintainer-mode, then on receipt of
+ a fatal signal rsync will try to open an xterm running gdb,
+ similarly to Samba's "panic action" or GNOME's bug-buddy.
+ (Martin Pool)