From: Florian Forster <octo@collectd.org>
Date: Mon, 20 Nov 2017 13:19:46 +0000 (+0100)
Subject: table plugin: Assert that result_num is zero when result is NULL.
X-Git-Url: https://git.octo.it/?a=commitdiff_plain;ds=sidebyside;h=dfe33d435b2c29f7376507463700c5d4d07f3dfa;hp=4587f88e51545d383aa759109ed6cd1ed851fe13;p=collectd.git

table plugin: Assert that result_num is zero when result is NULL.

The Coverity check gets confused by the `tbl->results == NULL` check:
due to the check, is assumes that tbl->results *may* be NULL. It then
discovers the dereference in tbl_clear() without realizing that "result"
and "result_num" are linked and that situation can't happen. This
assertion makes this link a bit easier to conclude.

CID: 37966
---

diff --git a/src/table.c b/src/table.c
index 3e8feada..cebcaed0 100644
--- a/src/table.c
+++ b/src/table.c
@@ -279,6 +279,7 @@ static int tbl_config_table(oconfig_item_t *ci) {
   }
 
   if (NULL == tbl->results) {
+    assert(tbl->results_num == 0);
     log_err("Table \"%s\" does not specify any (valid) results.", tbl->file);
     status = 1;
   }