MAINT: comment, fix from review

2 files changed, 10 insertions, 2 deletions

diff --git a/numpy/core/src/common/ufunc_override.c b/numpy/core/src/common/ufunc_override.c
index 3bc34c3f5..e1aae8ea6 100644
--- a/numpy/core/src/common/ufunc_override.c
+++ b/numpy/core/src/common/ufunc_override.c
@@ -93,15 +93,18 @@ PyUFuncOverride_GetOutObjects(PyObject *kwds, PyObject **out_kwd_obj, PyObject *
         return 0;
     }
     if (PyTuple_CheckExact(*out_kwd_obj)) {
+        /*
+         * The C-API recommends calling PySequence_Fast before any of the other
+         * PySequence_Fast* functions. This is required for PyPy
+         */
         PyObject *seq = PySequence_Fast(*out_kwd_obj, "cannot convert");
         int ret;
         if (seq == NULL) {
             return -1;
         }
-        Py_DECREF(*out_kwd_obj);
         *out_objs = PySequence_Fast_ITEMS(seq);
         ret = PySequence_Fast_GET_SIZE(seq);
-        *out_kwd_obj = seq;
+        Py_SETREF(*out_kwd_obj, seq);
         return ret;
     }
     else {
diff --git a/numpy/core/src/multiarray/common.c b/numpy/core/src/multiarray/common.c
index 3e5221a59..84ad04723 100644
--- a/numpy/core/src/multiarray/common.c
+++ b/numpy/core/src/multiarray/common.c
@@ -441,11 +441,16 @@ PyArray_DTypeFromObjectHelper(PyObject *obj, int maxdims,
     }
 
     /* Recursive case, first check the sequence contains only one type */
+    /*
+     * The C-API recommends calling PySequence_Fast before any of the other
+     * PySequence_Fast* functions. This is required for PyPy
+     */
     seq = PySequence_Fast(obj, "Could not convert object to sequence");
     if (seq == NULL) {
         goto fail;
     }
     size = PySequence_Fast_GET_SIZE(seq);
+    /* objects is borrowed, do not release seq */
     objects = PySequence_Fast_ITEMS(seq);
     common_type = size > 0 ? Py_TYPE(objects[0]) : NULL;
     for (i = 1; i < size; ++i) {