Compiled on a plain RH 6.0 system with
--with-system-regex
--with-apxs=/usr/sbin/apxs
--with-mysql
--prefix=/usr

Backtrace:

#0  0x400f0a70 in _IO_new_fclose (fp=0x80a9f60) at iofclose.c:45
#1  0x402563ed in zend_open_file_dtor (f=0x80aa000)
    at /home/ek/cvs/php4/./libzend/zend-scanner.l:191
#2  0x4025f119 in zend_llist_del_element (l=0x402b27e8, element=0xbffff96c) at zend_llist.c:83
#3  0x40256404 in zend_close_file_handle (file_handle=0xbffff964)
    at /home/ek/cvs/php4/./libzend/zend-scanner.l:201
#4  0x40256563 in v_compile_files (mark_as_ref=1, file_count=1, files=0xbffff944)
    at /home/ek/cvs/php4/./libzend/zend-scanner.l:312
#5  0x402564be in compile_files (mark_as_ref=1, file_count=1)
    at /home/ek/cvs/php4/./libzend/zend-scanner.l:281
#6  0x40256642 in compile_filename (filename=0xbffff988)
    at /home/ek/cvs/php4/./libzend/zend-scanner.l:354
#7  0x4026eb57 in execute (op_array=0x80a7b90) at zend_execute.c:1862
#8  0x40225f00 in php_execute_script (primary_file=0xbffffb88) at main.c:1171
#9  0x40223f39 in apache_php_module_main (r=0x80a4f44, fd=18, display_source_mode=0)
    at mod_php4.c:128
#10 0x40224438 in send_php (r=0x80a4f44, display_source_mode=0, 
    filename=0x80a59fc "/home/httpd/html/info.php3") at mod_php4.c:371
#11 0x4022446b in send_parsed_php (r=0x80a4f44) at mod_php4.c:383
#12 0x80517e1 in ap_invoke_handler ()
#13 0x805e28b in ap_some_auth_required ()
#14 0x805e2db in ap_process_request ()
#15 0x8058c88 in ap_child_terminate ()
#16 0x8058dbf in ap_child_terminate ()
#17 0x8058eb9 in ap_child_terminate ()
#18 0x8059368 in ap_child_terminate ()
#19 0x8059920 in main ()
#20 0x400b7cb3 in __libc_start_main (main=0x80596e0 <main>, argc=4, argv=0xbffffd54, 
    init=0x804da1c <_init>, fini=0x8065a8c <_fini>, rtld_fini=0x4000a350 <_dl_fini>, 
    stack_end=0xbffffd4c) at ../sysdeps/generic/libc-start.c:78