bugfix: treat shdict entries with ttl equal to 0 as expired.

Author: zhuizhuhaomeng

.travis.yml

@@ -44,8 +44,8 @@ env:
     - TEST_NGINX_SLEEP=0.006
   matrix:
     #- NGINX_VERSION=1.21.4 OPENSSL_VER=1.1.12
-    - NGINX_VERSION=1.25.1 OPENSSL_VER=1.1.1w
-    - NGINX_VERSION=1.25.1 OPENSSL_VER=1.1.1w USE_PCRE2=Y
+    - NGINX_VERSION=1.25.3 OPENSSL_VER=1.1.1w
+    - NGINX_VERSION=1.25.3 OPENSSL_VER=1.1.1w USE_PCRE2=Y
 
 services:
  - memcache

src/ngx_stream_lua_shdict.c

@@ -225,7 +225,7 @@ ngx_stream_lua_shdict_lookup(ngx_shm_zone_t *shm_zone, ngx_uint_t hash,
 
                 dd("time to live: %lld", (long long) ms);
 
-                if (ms < 0) {
+                if (ms <= 0) {
                     dd("node already expired");
                     return NGX_DONE;
                 }