Initialize new jsonb iterator to zero

Use palloc0() instead of palloc() to create a new JsonbIterator.
Otherwise, the isScalar field is sometimes not initialized.  There is
probably no impact in practice, but it's cleaner this way and it avoids
future problems.

diff --git a/src/backend/utils/adt/jsonb_util.c b/src/backend/utils/adt/jsonb_util.c
index 2524584d957f140f5f05e60a3b0470fabfb4b17b..3be900f8ee07e7ea2cb5d2600a14330ad91db33a 100644 (file)
--- a/src/backend/utils/adt/jsonb_util.c
+++ b/src/backend/utils/adt/jsonb_util.c
@@ -901,7 +901,7 @@ iteratorFromContainer(JsonbContainer *container, JsonbIterator *parent)
 {
    JsonbIterator *it;
 
-   it = palloc(sizeof(JsonbIterator));
+   it = palloc0(sizeof(JsonbIterator));
    it->container = container;
    it->parent = parent;
    it->nElems = JsonContainerSize(container);