don't double free in lru_crawler on closed clients

during finalization, a poll and deliberate close are run. if a client is
closed during the poll it might double free.

1 files changed, 4 insertions, 1 deletions

diff --git a/crawler.c b/crawler.c
index d0e635c..fc7567c 100644
--- a/crawler.c
+++ b/crawler.c
@@ -402,7 +402,10 @@ static void *item_crawler_thread(void *arg) {
             active_crawler_mod.mod->finalize(&active_crawler_mod);
         if (active_crawler_mod.c.c != NULL) {
             lru_crawler_poll(&active_crawler_mod.c);
-            lru_crawler_release_client(&active_crawler_mod.c);
+            // Double checking in case the client closed during the poll
+            if (active_crawler_mod.c.c != NULL) {
+                lru_crawler_release_client(&active_crawler_mod.c);
+            }
         }
         active_crawler_mod.mod = NULL;
     }