nginx-1.2.1-add_core_vars_polluting_globals.patch

--- nginx-1.2.1/src/http/ngx_http_variables.c	2012-03-05 20:36:51.000000000 +0800
+++ nginx-1.2.1-patched/src/http/ngx_http_variables.c	2012-05-17 16:21:42.120968722 +0800
@@ -1898,6 +1898,7 @@
 {
     ngx_int_t                   rc;
     ngx_http_variable_t        *v;
+    ngx_http_variable_t        *value;
     ngx_http_core_main_conf_t  *cmcf;
 
     cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
@@ -1918,7 +1919,14 @@
     }
 
     for (v = ngx_http_core_variables; v->name.len; v++) {
-        rc = ngx_hash_add_key(cmcf->variables_keys, &v->name, v,
+        value = ngx_palloc(cf->pool, sizeof(ngx_http_variable_t));
+        if (value == NULL) {
+            return NGX_ERROR;
+        }
+
+        *value = *v;
+
+        rc = ngx_hash_add_key(cmcf->variables_keys, &value->name, value,
                               NGX_HASH_READONLY_KEY);
 
         if (rc == NGX_OK) {