diff --git a/msgpack/_unpacker.pyx b/msgpack/_unpacker.pyx
index da6acbb..fc283f3 100644
--- a/msgpack/_unpacker.pyx
+++ b/msgpack/_unpacker.pyx
@@ -129,7 +129,8 @@ 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)
+        if PyObject_GetBuffer(contiguous, view, PyBUF_SIMPLE) == -1:
+            raise
 
     buffer_len[0] = view.len
     buf[0] = <char*> view.buf
diff --git a/msgpack/fallback.py b/msgpack/fallback.py
index 159dff2..e4cb987 100644
--- a/msgpack/fallback.py
+++ b/msgpack/fallback.py
@@ -328,8 +328,7 @@ class Unpacker:
             self._buf_checkpoint = 0
 
         # Use extend here: INPLACE_ADD += doesn't reliably typecast memoryview in jython
-        # tobytes ensures compatibility with non-contiguous memoryviews
-        self._buffer.extend(view.tobytes())
+        self._buffer.extend(view if view.contiguous else view.tobytes())
         view.release()
 
     def _consume(self):