msgpack · methane · Jun 2, 2026 · May 26, 2026 · May 26, 2026 · May 27, 2026
diff --git a/msgpack/_unpacker.pyx b/msgpack/_unpacker.pyx
@@ -129,10 +129,9 @@ cdef inline int get_data_from_buffer(object obj,
        PyBuffer_Release(view)
        # create a contiguous copy and get buffer
        contiguous = PyMemoryView_GetContiguous(obj, PyBUF_READ, b'C')
-        PyObject_GetBuffer(contiguous, view, PyBUF_SIMPLE)
-        # view must hold the only reference to contiguous,
-        # so memory is freed when view is released
-        Py_DECREF(contiguous)
+        if PyObject_GetBuffer(contiguous, view, PyBUF_SIMPLE) == -1:
+            raise
+
    buffer_len[0] = view.len
    buf[0] = <char*> view.buf
    return 1

diff --git a/msgpack/fallback.py b/msgpack/fallback.py
@@ -328,7 +328,7 @@ def feed(self, next_bytes):
            self._buf_checkpoint = 0

        # Use extend here: INPLACE_ADD += doesn't reliably typecast memoryview in jython
-        self._buffer.extend(view)
+        self._buffer.extend(view if view.contiguous else view.tobytes())
        view.release()

    def _consume(self):

diff --git a/test/test_memoryview.py b/test/test_memoryview.py
@@ -97,3 +97,15 @@ def test_multidim_memoryview():
    data = view.cast(view.format, (3, 2))
    packed = packb(data)
    assert packed == b"\xc4\x06\x00\x00\x00\x00\x00\x00"
+
+
+def test_unpack_noncontiguous_memoryview():
+    # Use a multi-byte value so the padded stride-2 view is non-contiguous.
+    packed = packb(2**32)
+    padded = bytearray()
+    for byte in packed:
+        padded.append(byte)
+        padded.append(0)
+    noncont = memoryview(bytes(padded))[::2]
+    assert not noncont.c_contiguous
+    assert unpackb(noncont) == 2**32