Changeset: 17fe5e1f6200 for MonetDB
URL: http://dev.monetdb.org/hg/MonetDB?cmd=changeset;node=17fe5e1f6200
Modified Files:
monetdb5/optimizer/opt_reorder.c
Branch: Jul2017
Log Message:
Avoid malloc of size zero.
diffs (17 lines):
diff --git a/monetdb5/optimizer/opt_reorder.c b/monetdb5/optimizer/opt_reorder.c
--- a/monetdb5/optimizer/opt_reorder.c
+++ b/monetdb5/optimizer/opt_reorder.c
@@ -133,8 +133,11 @@ OPTdependencies(Client cntxt, MalBlkPtr
list[i]->pos2 = sz;
sz += list[i]->used;
}
- uselist = GDKzalloc(sizeof(int)*sz);
- if (!uselist) {
+ if (sz == 0 ||
+ (uselist = GDKzalloc(sizeof(int)*sz)) == NULL) {
+ /* there is no distinction between successfully finding
+ * nothing and failure; in either case the caller doesn't do
+ * anything */
OPTremoveDep(list, mb->stop);
GDKfree(var);
return NULL;
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