Fixed segfault with try_files introduced by c985d90a8d1f. If alias was used in a location given by a regular expression, nginx used to do wrong thing in try_files if a location name (i.e., regular expression) was an exact prefix of URI. The following configuration triggered a segmentation fault on a request to "/mail": location ~ /mail { alias /path/to/directory; try_files $uri =404; } Reported by Per Hansson.