Issue #1159051: GzipFile now raises EOFError when reading a corrupted file
with truncated header or footer.
Added tests for reading truncated gzip, bzip2, and lzma files.
diff --git a/Lib/test/test_bz2.py b/Lib/test/test_bz2.py
index 912fac1..df7e18c 100644
--- a/Lib/test/test_bz2.py
+++ b/Lib/test/test_bz2.py
@@ -577,6 +577,20 @@
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()