added prev null case

nplewton · nplewton · commit ff725ebbcaae · 2017-10-26T10:09:15.000-07:00
diff --git a/src/backend/storage/buffer/random.c b/src/backend/storage/buffer/random.c
@@ -63,7 +63,12 @@ uint64_t evictEntry() {
       cur = cur->next;
    }
    returnAddress = cur->pageAddress;
-   prev->next = NULL;
+   if (prev != NULL) {
+      prev->next = NULL;
+   }
+   else {
+      (hashTable->entries)[randomIndex] = NULL;
+   }
    free(cur);
    
    return returnAddress;
