Fixes decrement-before-check problem (issue #362).

Adds test for issue #362.

1 files changed, 8 insertions, 0 deletions

diff --git a/crawler.c b/crawler.c
index 9c81bba..07fca4d 100644
--- a/crawler.c
+++ b/crawler.c
@@ -533,6 +533,14 @@ static int do_lru_crawler_start(uint32_t id, uint32_t remaining) {
         if (remaining == LRU_CRAWLER_CAP_REMAINING) {
             remaining = do_get_lru_size(sid);
         }
+        /* Values for remaining:
+         * remaining = 0
+         * - scan all elements, until a NULL is reached
+         * - if empty, NULL is reached right away
+         * remaining = n + 1
+         * - first n elements are parsed (or until a NULL is reached)
+         */
+        if (remaining) remaining++;
         crawlers[sid].remaining = remaining;
         crawlers[sid].slabs_clsid = sid;
         crawlers[sid].reclaimed = 0;