Bug 141051

# php ./phpinfo.php > /dev/null
Segmentation fault: 11 (core dumped)
# gdb php ./php.core
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This GDB was configured as "amd64-marcel-freebsd"...(no debugging symbols found)...
Core was generated by `php'.
Program terminated with signal 11, Segmentation fault.
Reading symbols from /lib/libcrypt.so.5...(no debugging symbols found)...done.
Loaded symbols for /lib/libcrypt.so.5
Reading symbols from /lib/libm.so.5...(no debugging symbols found)...done.
Loaded symbols for /lib/libm.so.5
Reading symbols from /usr/local/lib/libxml2.so.5...(no debugging symbols found)...done.
Loaded symbols for /usr/local/lib/libxml2.so.5
Reading symbols from /lib/libz.so.5...(no debugging symbols found)...done.
Loaded symbols for /lib/libz.so.5
Reading symbols from /usr/local/lib/libiconv.so.3...(no debugging symbols found)...done.
Loaded symbols for /usr/local/lib/libiconv.so.3
Reading symbols from /lib/libc.so.7...(no debugging symbols found)...done.
Loaded symbols for /lib/libc.so.7
Reading symbols from /usr/local/lib/compat/libm.so.4...(no debugging symbols found)...done.
Loaded symbols for /usr/local/lib/compat/libm.so.4
Reading symbols from /usr/local/lib/php/20060613/Optimizer/php-5.2.x/ZendOptimizer.so...(no debugging symbols found)...done.
Loaded symbols for /usr/local/lib/php/20060613/Optimizer/php-5.2.x/ZendOptimizer.so
Reading symbols from /libexec/ld-elf.so.1...(no debugging symbols found)...done.
Loaded symbols for /libexec/ld-elf.so.1
#0  0x0000000000000000 in ?? ()
(gdb) bt
#0  0x0000000000000000 in ?? ()
#1  0x00000008076455e7 in ?? () from /usr/local/lib/php/20060613/Optimizer/php-5.2.x/ZendOptimizer.so
#2  0x0000000807740491 in ?? () from /usr/local/lib/php/20060613/Optimizer/php-5.2.x/ZendOptimizer.so
#3  0x00000008008350d0 in ?? () from /libexec/ld-elf.so.1
#4  0x000000080070cc61 in dlsym () from /libexec/ld-elf.so.1
#5  0x000000080070cd97 in dlclose () from /libexec/ld-elf.so.1
#6  0x00000000004fff44 in zend_llist_destroy ()
#7  0x0000000000509783 in zend_shutdown ()
#8  0x00000000004c586a in php_module_shutdown ()
#9  0x000000000058e24b in main ()
(gdb)

I read *many* posts in the internet and it seems that this problem is well known since 6.x-RELEASE. Shouldn't we mark ZendOptimizer as broken on amd64 platforms?!

Fix: 

Remove 

zend_extension_manager.optimizer="/usr/local/lib/php/20060613/Optimizer"

from php.ini.