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-rw-r--r--src/event/ngx_event.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/event/ngx_event.c b/src/event/ngx_event.c
index 976bd6465..cbae0ee6a 100644
--- a/src/event/ngx_event.c
+++ b/src/event/ngx_event.c
@@ -892,6 +892,10 @@ ngx_events_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
ngx_conf_t pcf;
ngx_event_module_t *m;
+ if (*(void **) conf) {
+ return "is duplicate";
+ }
+
/* count the number of the event modules and set up their indices */
ngx_event_max_module = 0;