I`m get crash apache.
Backtrace 
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warning: exec file is newer than core file.
Core was generated by `httpd'.
Program terminated with signal 11, Segmentation fault.
Reading symbols from /lib/libcrypt.so.3...done.
Loaded symbols for /lib/libcrypt.so.3
Reading symbols from /usr/local/lib/libexpat.so.6...done.
Loaded symbols for /usr/local/lib/libexpat.so.6
Reading symbols from /lib/libutil.so.5...done.
Loaded symbols for /lib/libutil.so.5
Reading symbols from /usr/local/lib/libsqlite3.so.8...done.
Loaded symbols for /usr/local/lib/libsqlite3.so.8
Reading symbols from /lib/libc.so.6...done.
Loaded symbols for /lib/libc.so.6
Reading symbols from /usr/local/libexec/apache/mod_env.so...done.
Loaded symbols for /usr/local/libexec/apache/mod_env.so
Reading symbols from /usr/local/libexec/apache/mod_log_config.so...done.
Loaded symbols for /usr/local/libexec/apache/mod_log_config.so
Reading symbols from /usr/local/libexec/apache/mod_mime_magic.so...done.
Loaded symbols for /usr/local/libexec/apache/mod_mime_magic.so
Reading symbols from /usr/local/libexec/apache/mod_mime.so...done.
Loaded symbols for /usr/local/libexec/apache/mod_mime.so
Reading symbols from /usr/local/libexec/apache/mod_negotiation.so...done.
Loaded symbols for /usr/local/libexec/apache/mod_negotiation.so
Reading symbols from /usr/local/libexec/apache/mod_status.so...done.
Loaded symbols for /usr/local/libexec/apache/mod_status.so
Reading symbols from /usr/local/libexec/apache/mod_info.so...done.
Loaded symbols for /usr/local/libexec/apache/mod_info.so
Reading symbols from /usr/local/libexec/apache/mod_include.so...done.
Loaded symbols for /usr/local/libexec/apache/mod_include.so
Reading symbols from /usr/local/libexec/apache/mod_autoindex.so...done.
Loaded symbols for /usr/local/libexec/apache/mod_autoindex.so
Reading symbols from /usr/local/libexec/apache/mod_dir.so...done.
Loaded symbols for /usr/local/libexec/apache/mod_dir.so
Reading symbols from /usr/local/libexec/apache/mod_cgi.so...done.
Loaded symbols for /usr/local/libexec/apache/mod_cgi.so
Reading symbols from /usr/local/libexec/apache/mod_actions.so...done.
Loaded symbols for /usr/local/libexec/apache/mod_actions.so
Reading symbols from /usr/local/libexec/apache/mod_speling.so...done.
Loaded symbols for /usr/local/libexec/apache/mod_speling.so
Reading symbols from /usr/local/libexec/apache/mod_alias.so...done.
Loaded symbols for /usr/local/libexec/apache/mod_alias.so
Reading symbols from /usr/local/libexec/apache/mod_rewrite.so...done.
Loaded symbols for /usr/local/libexec/apache/mod_rewrite.so
Reading symbols from /usr/local/libexec/apache/mod_access.so...done.
Loaded symbols for /usr/local/libexec/apache/mod_access.so
Reading symbols from /usr/local/libexec/apache/mod_auth.so...done.
Loaded symbols for /usr/local/libexec/apache/mod_auth.so
Reading symbols from /usr/local/libexec/apache/mod_expires.so...done.
Loaded symbols for /usr/local/libexec/apache/mod_expires.so
Reading symbols from /usr/local/libexec/apache/mod_headers.so...done.
Loaded symbols for /usr/local/libexec/apache/mod_headers.so
Reading symbols from /usr/local/libexec/apache/mod_setenvif.so...done.
Loaded symbols for /usr/local/libexec/apache/mod_setenvif.so
Reading symbols from /usr/local/libexec/apache/libphp5.so...done.
Loaded symbols for /usr/local/libexec/apache/libphp5.so
Reading symbols from /usr/lib/libssl.so.4...done.
Loaded symbols for /usr/lib/libssl.so.4
Reading symbols from /lib/libcrypto.so.4...done.
Loaded symbols for /lib/libcrypto.so.4
Reading symbols from /lib/libm.so.4...done.
Loaded symbols for /lib/libm.so.4
Reading symbols from /usr/local/lib/libxml2.so.5...done.
Loaded symbols for /usr/local/lib/libxml2.so.5
Reading symbols from /lib/libz.so.3...done.
Loaded symbols for /lib/libz.so.3
Reading symbols from /usr/local/lib/libiconv.so.3...done.
Loaded symbols for /usr/local/lib/libiconv.so.3
Reading symbols from /usr/local/libexec/apache/mod_extract_forwarded.so...done.
Loaded symbols for /usr/local/libexec/apache/mod_extract_forwarded.so
Reading symbols from /usr/local/php5/lib/php/20060613/ZendExtensionManager.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/ZendExtensionManager.so
Reading symbols from /usr/local/php5/lib/php/20060613/bcmath.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/bcmath.so
Reading symbols from /usr/local/php5/lib/php/20060613/bz2.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/bz2.so
Reading symbols from /usr/lib/libbz2.so.2...done.
Loaded symbols for /usr/lib/libbz2.so.2
Reading symbols from /usr/local/php5/lib/php/20060613/calendar.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/calendar.so
Reading symbols from /usr/local/php5/lib/php/20060613/ctype.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/ctype.so
Reading symbols from /usr/local/php5/lib/php/20060613/curl.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/curl.so
Reading symbols from /usr/local/lib/libcurl.so.5...done.
Loaded symbols for /usr/local/lib/libcurl.so.5
Reading symbols from /usr/local/php5/lib/php/20060613/dba.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/dba.so
Reading symbols from /usr/local/php5/lib/php/20060613/dbase.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/dbase.so
Reading symbols from /usr/local/php5/lib/php/20060613/dom.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/dom.so
Reading symbols from /usr/local/php5/lib/php/20060613/exif.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/exif.so
Reading symbols from /usr/local/php5/lib/php/20060613/ftp.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/ftp.so
Reading symbols from /usr/local/php5/lib/php/20060613/gd.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/gd.so
Reading symbols from /usr/local/lib/libt1.so.5...done.
Loaded symbols for /usr/local/lib/libt1.so.5
Reading symbols from /usr/local/lib/libfreetype.so.9...done.
Loaded symbols for /usr/local/lib/libfreetype.so.9
Reading symbols from /usr/local/lib/libpng.so.5...done.
Loaded symbols for /usr/local/lib/libpng.so.5
Reading symbols from /usr/local/lib/libjpeg.so.9...done.
Loaded symbols for /usr/local/lib/libjpeg.so.9
Reading symbols from /usr/local/php5/lib/php/20060613/gettext.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/gettext.so
Reading symbols from /usr/local/lib/libintl.so.8...done.
Loaded symbols for /usr/local/lib/libintl.so.8
Reading symbols from /usr/local/php5/lib/php/20060613/iconv.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/iconv.so
Reading symbols from /usr/local/php5/lib/php/20060613/mbstring.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/mbstring.so
Reading symbols from /usr/local/php5/lib/php/20060613/mcrypt.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/mcrypt.so
Reading symbols from /usr/local/lib/libmcrypt.so.8...done.
Loaded symbols for /usr/local/lib/libmcrypt.so.8
Reading symbols from /usr/local/lib/libltdl.so.4...done.
Loaded symbols for /usr/local/lib/libltdl.so.4
Reading symbols from /usr/local/php5/lib/php/20060613/mhash.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/mhash.so
Reading symbols from /usr/local/lib/libmhash.so.2...done.
Loaded symbols for /usr/local/lib/libmhash.so.2
Reading symbols from /usr/local/php5/lib/php/20060613/mysql.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/mysql.so
Reading symbols from /usr/local/lib/mysql/libmysqlclient.so.14...done.
Loaded symbols for /usr/local/lib/mysql/libmysqlclient.so.14
Reading symbols from /usr/local/php5/lib/php/20060613/zlib.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/zlib.so
Reading symbols from /usr/local/php5/lib/php/20060613/pdo.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/pdo.so
Reading symbols from /usr/local/php5/lib/php/20060613/pdo_sqlite.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/pdo_sqlite.so
Reading symbols from /usr/local/php5/lib/php/20060613/pdo_mysql.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/pdo_mysql.so
Reading symbols from /usr/local/php5/lib/php/20060613/posix.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/posix.so
Reading symbols from /usr/local/php5/lib/php/20060613/readline.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/readline.so
Reading symbols from /usr/lib/libhistory.so.6...done.
Loaded symbols for /usr/lib/libhistory.so.6
Reading symbols from /lib/libreadline.so.6...done.
Loaded symbols for /lib/libreadline.so.6
Reading symbols from /lib/libncurses.so.6...done.
Loaded symbols for /lib/libncurses.so.6
Reading symbols from /usr/local/php5/lib/php/20060613/session.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/session.so
Reading symbols from /usr/local/php5/lib/php/20060613/simplexml.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/simplexml.so
Reading symbols from /usr/local/php5/lib/php/20060613/soap.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/soap.so
Reading symbols from /usr/local/php5/lib/php/20060613/sockets.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/sockets.so
Reading symbols from /usr/local/php5/lib/php/20060613/spl.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/spl.so
Reading symbols from /usr/local/php5/lib/php/20060613/tokenizer.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/tokenizer.so
Reading symbols from /usr/local/php5/lib/php/20060613/xml.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/xml.so
Reading symbols from /usr/local/php5/lib/php/20060613/wddx.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/wddx.so
Reading symbols from /usr/local/php5/lib/php/20060613/xmlreader.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/xmlreader.so
Reading symbols from /usr/local/php5/lib/php/20060613/xmlrpc.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/xmlrpc.so
Reading symbols from /usr/local/php5/lib/php/20060613/xmlwriter.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/xmlwriter.so
Reading symbols from /usr/local/php5/lib/php/20060613/xsl.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/xsl.so
Reading symbols from /usr/local/lib/libexslt.so.8...done.
Loaded symbols for /usr/local/lib/libexslt.so.8
Reading symbols from /usr/local/lib/libxslt.so.2...done.
Loaded symbols for /usr/local/lib/libxslt.so.2
Reading symbols from /usr/local/php5/lib/php/20060613/zip.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/zip.so
Reading symbols from /usr/local/php5/lib/php/20060613/mysqli.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/mysqli.so
Reading symbols from /usr/local/php5/lib/php/20060613/hash.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/hash.so
Reading symbols from /usr/local/php5/lib/php/20060613/json.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/json.so
Reading symbols from /usr/local/php5/lib/php/20060613/eaccelerator.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/eaccelerator.so
Reading symbols from /usr/local/php5/lib/php/20060613/Optimizer/php-5.2.x/ZendOptimizer.so...done.
Loaded symbols for /usr/local/php5/lib/php/20060613/Optimizer/php-5.2.x/ZendOptimizer.so
Reading symbols from /libexec/ld-elf.so.1...done.
Loaded symbols for /libexec/ld-elf.so.1
#0  ap_rflush (r=0x842a3bc) at http_protocol.c:2824
2824	http_protocol.c: No such file or directory.
	in http_protocol.c
(gdb) btfull
Undefined command: "btfull".  Try "help".
(gdb) bt full
#0  ap_rflush (r=0x842a3bc) at http_protocol.c:2824
No locals.
#1  0x383d9474 in sapi_flush () at /home/subadm/ports/lang/php5/work/php-5.2.8/main/SAPI.c:922
No locals.
#2  0x383d3102 in php_module_shutdown () at /home/subadm/ports/lang/php5/work/php-5.2.8/main/main.c:1904
No locals.
#3  0x383d31bb in php_module_shutdown_wrapper (sapi_globals=0x385329c0)
    at /home/subadm/ports/lang/php5/work/php-5.2.8/main/main.c:1877
No locals.
#4  0x08053ff3 in ap_child_exit_modules (p=0x841d00c, s=0x808d034) at http_config.c:1637
	m = (module *) 0x38532880
#5  0x0805945d in clean_child_exit (code=0) at http_main.c:546
No locals.
#6  0x0805a91b in child_main (child_num_arg=138580020) at http_main.c:4927
	conn_io = (BUFF *) 0x8
	r = (request_rec *) 0xc3
	clen = 16
	sa_server = {sa_len = 16 '\020', sa_family = 2 '\002', 
  sa_data = "\000P\177\000\000\001\000\000\000\000\000\000\000"}
	sa_client = {sa_len = 16 '\020', sa_family = 2 '\002', 
  sa_data = "Т\037\177\000\000\001\000\000\000\000\000\000\000"}
#7  0x0805ae77 in make_child (s=0x1e, slot=123, now=944275504) at http_main.c:5071
	pid = 0
#8  0x0805c2d6 in standalone_main (argc=0, argv=0x38488030) at http_main.c:5272
	ps = (parent_score *) 0x1
	remaining_children_to_start = 0
#9  0x0805cd10 in main (argc=1, argv=0xbfbfeca0) at http_main.c:5795
	c = 0
	sock_in = -1077941088
	sock_out = 940043145
	s = 0x0

-------------------------------------------------------------------------
uname -a
FreeBSD point.z8.ru 6.4-RELEASE-p3 FreeBSD 6.4-RELEASE-p3 #0: Mon Mar 23 15:01:39 MSK 2009     root@build.pht:/usr/src/sys/i386/compile/VH_6.4_32_01  i386
-------------------------------------------------------------------------
/usr/local/sbin/httpd -V
Server version: Apache/1.3.41 (Unix)
Server built:   Apr 21 2009 09:35:38
Server's Module Magic Number: 19990320:18
Server compiled with....
 -D BIG_SECURITY_HOLE
 -D HAVE_MMAP
 -D USE_MMAP_SCOREBOARD
 -D USE_MMAP_FILES
 -D HAVE_FLOCK_SERIALIZED_ACCEPT
 -D SINGLE_LISTEN_UNSERIALIZED_ACCEPT
 -D DYNAMIC_MODULE_LIMIT=64
 -D HARD_SERVER_LIMIT=512
 -D SO_ACCEPTFILTER
 -D ACCEPT_FILTER_NAME="httpready"
 -D HTTPD_ROOT="/usr/local"
 -D SUEXEC_BIN="/usr/local/sbin/suexec"
 -D DEFAULT_PIDLOG="/var/run/httpd.pid"
 -D DEFAULT_SCOREBOARD="/var/run/httpd.scoreboard"
 -D DEFAULT_LOCKFILE="/var/run/httpd.lock"
 -D DEFAULT_ERRORLOG="/var/log/httpd-error.log"
 -D TYPES_CONFIG_FILE="etc/apache/mime.types"
 -D SERVER_CONFIG_FILE="etc/apache/httpd.conf"
 -D ACCESS_CONFIG_FILE="etc/apache/access.conf"
 -D RESOURCE_CONFIG_FILE="etc/apache/srm.conf"
------------------------------------------------------------
I`m write simple patch to avoid this problem

--- /usr/ports/www/apache13/work/apache_1.3.41/src/main/http_protocol.c	2006-07-12 12:16:05.000000000 +0400
+++ ./src/main/http_protocol.c	2009-04-21 09:33:44.000000000 +0400
@@ -2820,6 +2820,9 @@
 
 API_EXPORT(int) ap_rflush(request_rec *r)
 {
+	if (r->connection == NULL){
+		return EOF;
+	}
     if (ap_bflush(r->connection->client) < 0) {
         if (!r->connection->aborted) {
             ap_log_rerror(APLOG_MARK, APLOG_INFO, r,