MonetDB: default - q_dequeue(): made assertion more strict

[Stefan Manegold]

Changeset: 960af9c5c992 for MonetDB
URL: http://dev.monetdb.org/hg/MonetDB?cmd=changeset;node=960af9c5c992
Modified Files:
        monetdb5/mal/mal_dataflow.c
Branch: default
Log Message:

q_dequeue(): made assertion more strict


diffs (12 lines):

diff --git a/monetdb5/mal/mal_dataflow.c b/monetdb5/mal/mal_dataflow.c
--- a/monetdb5/mal/mal_dataflow.c
+++ b/monetdb5/mal/mal_dataflow.c
@@ -203,7 +203,7 @@ q_dequeue(queue *q)
        if (exiting)
                return NULL;
        MT_lock_set(&q->l, "q_dequeue");
-       assert(q->last);
+       assert(q->last > 0);
        if (q->last > 0) {
                /* LIFO favors garbage collection */
                r = (void*) q->data[--q->last];
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