It appears that my bug report is a duplicate of 9805, but mine does include
a backtrace.
Daniel
----- Original Message -----
From: <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
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: [EMAIL PROTECTED]
> 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.
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> 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
>
>
>
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