Re: PHP 4.0 Bug #9940: php cgi crashes when using ob_start callback function

It appears that my bug report is a duplicate of 9805, but mine does include a backtrace. Daniel ----- Original Message ----- From: <danbeck@dealnews.com> To: <php-dev@lists.php.net> Sent: Thursday, March 22, 2001 2:51 PM Subject: [PHP-DEV] PHP 4.0 Bug #9940: php cgi crashes when using ob_start callback function > From: danbeck@dealnews.com > Operating system: linux 2.2.16 > PHP version: 4.0 Latest CVS (22/03/2001) > PHP Bug Type: Reproduceable crash > Bug description: php cgi crashes when using ob_start callback function > > The following script causes php to segfault when run in CGI mode. The segfaults do not happen if you remove the output callback function parameter of ob_start(). Please note that this does not happen when using php4.0.4pl1. > > #!/usr/local/bin/php -qe > <? > > function compress_output ($output) { > return($output); > } > > ob_start("compress_output"); > > echo "test\n"; > > ?> > > > Here is a backtrace of the core file. > > GNU gdb 4.18 > Copyright 1998 Free Software Foundation, Inc. > GDB is free software, covered by the GNU General Public License, and you are > welcome to change it and/or distribute copies of it under certain conditions. > Type "show copying" to see the conditions. > There is absolutely no warranty for GDB. Type "show warranty" for details. > This GDB was configured as "i386-redhat-linux"... > > warning: core file may not match specified executable file. > Core was generated by `php4 -qe ./test.php'. > Program terminated with signal 11, Segmentation fault. > Reading symbols from /lib/libpam.so.0...done. > Reading symbols from /lib/libdl.so.2...done. > Reading symbols from /usr/lib/libz.so.1...done. > Reading symbols from /usr/lib/mysql/libmysqlclient.so.10...done. > Reading symbols from /usr/local/lib/libpng.so.2...done. > Reading symbols from /usr/lib/libbz2.so.1.0...done. > Reading symbols from /lib/libresolv.so.2...done. > Reading symbols from /lib/libm.so.6...done. > Reading symbols from /lib/libcrypt.so.1...done. > Reading symbols from /lib/libnsl.so.1...done. > Reading symbols from /lib/libc.so.6...done. > Reading symbols from /lib/ld-linux.so.2...done. > Reading symbols from /lib/libnss_files.so.2...done. > #0 chunk_free (ar_ptr=0x819ebd0, p=0x81d6020) at malloc.c:2985 > 2985 malloc.c: No such file or directory. > (gdb) bt > #0 chunk_free (ar_ptr=0x819ebd0, p=0x81d6020) at malloc.c:2985 > #1 0x40156d75 in __libc_free (mem=0x81d6028) at malloc.c:2959 > #2 0x80e31f0 in _efree (ptr=0x81d604c, __zend_filename=0x814612f "output.c", __zend_lineno=227, > __zend_orig_filename=0x0, __zend_orig_lineno=0) at zend_alloc.c:238 > #3 0x80cdacc in php_end_ob_buffer (send_buffer=1 '\001', just_flush=0 '\000') at output.c:227 > #4 0x80cdb5f in php_end_ob_buffers (send_buffer=1 '\001') at output.c:250 > #5 0x8060db7 in php_request_shutdown (dummy=0x0) at main.c:643 > #6 0x805fc01 in main (argc=3, argv=0xbffffb24) at cgi_main.c:763 > > > > -- > Edit Bug report at: http://bugs.php.net/?id=9940&edit=1 > > > > -- > PHP Development Mailing List <http://www.php.net/> > To unsubscribe, e-mail: php-dev-unsubscribe@lists.php.net > For additional commands, e-mail: php-dev-help@lists.php.net > To contact the list administrators, e-mail: php-list-admin@lists.php.net > > >