Backport PR matplotlib#27595: Fix is_sorted_and_has_non_nan for byteswapped inputs.

Author: QuLogic

lib/matplotlib/tests/test_lines.py

@@ -249,6 +249,8 @@ def test_is_sorted_and_has_non_nan():
     assert _path.is_sorted_and_has_non_nan(np.array([1, 2, 3]))
     assert _path.is_sorted_and_has_non_nan(np.array([1, np.nan, 3]))
     assert not _path.is_sorted_and_has_non_nan([3, 5] + [np.nan] * 100 + [0, 2])
+    # [2, 256] byteswapped:
+    assert not _path.is_sorted_and_has_non_nan(np.array([33554432, 65536], ">i4"))
     n = 2 * mlines.Line2D._subslice_optim_min_size
     plt.plot([np.nan] * n, range(n))
 

src/_path_wrapper.cpp

@@ -699,8 +699,8 @@ static PyObject *Py_is_sorted_and_has_non_nan(PyObject *self, PyObject *obj)
 {
     bool result;
 
-    PyArrayObject *array = (PyArrayObject *)PyArray_FromAny(
-        obj, NULL, 1, 1, 0, NULL);
+    PyArrayObject *array = (PyArrayObject *)PyArray_CheckFromAny(
+        obj, NULL, 1, 1, NPY_ARRAY_NOTSWAPPED, NULL);
 
     if (array == NULL) {
         return NULL;