#17275: Fix class name in init errors in C bufferedio classes.

This fixes an apparent copy-and-paste error.

Original patch by Manuel Jacob.

Lib/test/test_io.py

@@ -1004,6 +1004,12 @@ class CBufferedReaderTest(BufferedReaderTest, SizeofTest):
         support.gc_collect()
         self.assertTrue(wr() is None, wr)
 
+    def test_args_error(self):
+        # Issue #17275
+        with self.assertRaisesRegexp(TypeError, "BufferedReader"):
+            self.tp(io.BytesIO(), 1024, 1024, 1024)
+
+
 class PyBufferedReaderTest(BufferedReaderTest):
     tp = pyio.BufferedReader
 
@@ -1296,6 +1302,11 @@ class CBufferedWriterTest(BufferedWriterTest, SizeofTest):
         with self.open(support.TESTFN, "rb") as f:
             self.assertEqual(f.read(), b"123xxx")
 
+    def test_args_error(self):
+        # Issue #17275
+        with self.assertRaisesRegexp(TypeError, "BufferedWriter"):
+            self.tp(io.BytesIO(), 1024, 1024, 1024)
+
 
 class PyBufferedWriterTest(BufferedWriterTest):
     tp = pyio.BufferedWriter
@@ -1646,6 +1657,7 @@ class BufferedRandomTest(BufferedReaderTest, BufferedWriterTest):
                 f.flush()
                 self.assertEqual(raw.getvalue(), b'1b\n2def\n3\n')
 
+
 class CBufferedRandomTest(CBufferedReaderTest, CBufferedWriterTest,
                           BufferedRandomTest, SizeofTest):
     tp = io.BufferedRandom
@@ -1664,6 +1676,12 @@ class CBufferedRandomTest(CBufferedReaderTest, CBufferedWriterTest,
         CBufferedReaderTest.test_garbage_collection(self)
         CBufferedWriterTest.test_garbage_collection(self)
 
+    def test_args_error(self):
+        # Issue #17275
+        with self.assertRaisesRegexp(TypeError, "BufferedRandom"):
+            self.tp(io.BytesIO(), 1024, 1024, 1024)
+
+
 class PyBufferedRandomTest(BufferedRandomTest):
     tp = pyio.BufferedRandom
 

Misc/ACKS

@@ -466,6 +466,7 @@ Roger Irwin
 Atsuo Ishimoto
 Paul Jackson
 Ben Jackson
+Manuel Jacob
 David Jacobs
 Kevin Jacobs
 Kjetil Jacobsen

Misc/NEWS

@@ -9,6 +9,9 @@ What's New in Python 2.7.4
 Core and Builtins
 -----------------
 
+- Issue #17275: Corrected class name in init error messages of the C version of
+  BufferedWriter and BufferedRandom.
+
 - Issue #7963: Fixed misleading error message that issued when object is
   called without arguments.
 

Modules/_io/bufferedio.c

@@ -1683,7 +1683,7 @@ bufferedwriter_init(buffered *self, PyObject *args, PyObject *kwds)
     self->ok = 0;
     self->detached = 0;
 
-    if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|nn:BufferedReader", kwlist,
+    if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|nn:BufferedWriter", kwlist,
                                      &raw, &buffer_size, &max_buffer_size)) {
         return -1;
     }
@@ -2316,7 +2316,7 @@ bufferedrandom_init(buffered *self, PyObject *args, PyObject *kwds)
     self->ok = 0;
     self->detached = 0;
 
-    if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|nn:BufferedReader", kwlist,
+    if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|nn:BufferedRandom", kwlist,
                                      &raw, &buffer_size, &max_buffer_size)) {
         return -1;
     }