# HG changeset patch
# User Valentin Bartenev <vbart@nginx.com>
# Date 1326717727 0
# Node ID 840f3e768ef85c65e4f0d94fa149c93e5a4a0fc0
# Parent  c8b9f62cb4143ff3b22e8168639a8069512a9258
Fixed division by zero exception in ngx_hash_init().

The ngx_hash_init() function did not expect call with zero elements count,
which caused FPE error on configs with an empty "types" block in http context
and "types_hash_max_size" > 10000.

Example configuration to reproduce:

  events { }

  http {
          types_hash_max_size 10001;
          types {}
          server {}
  }

diff --git a/src/core/ngx_hash.c b/src/core/ngx_hash.c
--- a/src/core/ngx_hash.c
+++ b/src/core/ngx_hash.c
@@ -277,7 +277,7 @@ ngx_hash_init(ngx_hash_init_t *hinit, ng
     start = nelts / (bucket_size / (2 * sizeof(void *)));
     start = start ? start : 1;
 
-    if (hinit->max_size > 10000 && hinit->max_size / nelts < 100) {
+    if (hinit->max_size > 10000 && nelts && hinit->max_size / nelts < 100) {
         start = hinit->max_size - 1000;
     }