Back out patch for #1159051, which caused backwards compatibility problems.

3 files changed, 0 insertions, 42 deletions

diff --git a/Lib/test/test_bz2.py b/Lib/test/test_bz2.py
index df7e18c..912fac1 100644
--- a/Lib/test/test_bz2.py
+++ b/Lib/test/test_bz2.py
@@ -577,20 +577,6 @@ class BZ2FileTest(BaseTest):
                 bz2f.seek(-150, 1)
                 self.assertEqual(bz2f.read(), self.TEXT[500-150:])
 
-    def test_read_truncated(self):
-        # Drop the eos_magic field (6 bytes) and CRC (4 bytes).
-        truncated = self.DATA[:-10]
-        with BZ2File(BytesIO(truncated)) as f:
-            self.assertRaises(EOFError, f.read)
-        with BZ2File(BytesIO(truncated)) as f:
-            self.assertEqual(f.read(len(self.TEXT)), self.TEXT)
-            self.assertRaises(EOFError, f.read, 1)
-        # Incomplete 4-byte file header, and block header of at least 146 bits.
-        for i in range(22):
-            with BZ2File(BytesIO(truncated[:i])) as f:
-                self.assertRaises(EOFError, f.read, 1)
-
-
 class BZ2CompressorTest(BaseTest):
     def testCompress(self):
         bz2c = BZ2Compressor()
diff --git a/Lib/test/test_gzip.py b/Lib/test/test_gzip.py
index 37fe853..5eac921 100644..100755
--- a/Lib/test/test_gzip.py
+++ b/Lib/test/test_gzip.py
@@ -389,20 +389,6 @@ class TestGzip(BaseTest):
             datac = gzip.compress(data)
             self.assertEqual(gzip.decompress(datac), data)
 
-    def test_read_truncated(self):
-        data = data1*50
-        # Drop the CRC (4 bytes) and file size (4 bytes).
-        truncated = gzip.compress(data)[:-8]
-        with gzip.GzipFile(fileobj=io.BytesIO(truncated)) as f:
-            self.assertRaises(EOFError, f.read)
-        with gzip.GzipFile(fileobj=io.BytesIO(truncated)) as f:
-            self.assertEqual(f.read(len(data)), data)
-            self.assertRaises(EOFError, f.read, 1)
-        # Incomplete 10-byte header.
-        for i in range(2, 10):
-            with gzip.GzipFile(fileobj=io.BytesIO(truncated[:i])) as f:
-                self.assertRaises(EOFError, f.read, 1)
-
     def test_read_with_extra(self):
         # Gzip data with an extra field
         gzdata = (b'\x1f\x8b\x08\x04\xb2\x17cQ\x02\xff'
diff --git a/Lib/test/test_lzma.py b/Lib/test/test_lzma.py
index 20d8582..a13cf3b 100644
--- a/Lib/test/test_lzma.py
+++ b/Lib/test/test_lzma.py
@@ -669,20 +669,6 @@ class FileTestCase(unittest.TestCase):
         with LZMAFile(BytesIO(COMPRESSED_XZ[:128])) as f:
             self.assertRaises(EOFError, f.read)
 
-    def test_read_truncated(self):
-        # Drop stream footer: CRC (4 bytes), index size (4 bytes),
-        # flags (2 bytes) and magic number (2 bytes).
-        truncated = COMPRESSED_XZ[:-12]
-        with LZMAFile(BytesIO(truncated)) as f:
-            self.assertRaises(EOFError, f.read)
-        with LZMAFile(BytesIO(truncated)) as f:
-            self.assertEqual(f.read(len(INPUT)), INPUT)
-            self.assertRaises(EOFError, f.read, 1)
-        # Incomplete 12-byte header.
-        for i in range(12):
-            with LZMAFile(BytesIO(truncated[:i])) as f:
-                self.assertRaises(EOFError, f.read, 1)
-
     def test_read_bad_args(self):
         f = LZMAFile(BytesIO(COMPRESSED_XZ))
         f.close()