When tried to access SugarCRM 6.5.13 after installation following error showed up in browser:

CRASH: PHP segmentation violation in session_start() called at [/install.php:486]

To fix that issue .htaccess file has to be created in SugarCRM main older with following content:

# BEGIN SUGARCRM RESTRICTIONS
 RedirectMatch 403 (?i)^.*\.log$
 RedirectMatch 403 (?i)/+not_imported_.*\.txt
 RedirectMatch 403 (?i)/+(soap|cache|xtemplate|data|examples|include|log4php|metadata|modules)/+.*\.(php|tpl)
 RedirectMatch 403 (?i)/+emailmandelivery\.php
 RedirectMatch 403 (?i)/+cache/+upload
 # END SUGARCRM RESTRICTIONS