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-rw-r--r--Lib/tarfile.py4
1 files changed, 2 insertions, 2 deletions
diff --git a/Lib/tarfile.py b/Lib/tarfile.py
index 92fdb7b..4991ae1 100644
--- a/Lib/tarfile.py
+++ b/Lib/tarfile.py
@@ -420,7 +420,7 @@ class _Stream:
except ImportError:
raise CompressionError("zlib module is not available")
self.zlib = zlib
- self.crc = zlib.crc32("")
+ self.crc = zlib.crc32("") & 0xffffffffL
if mode == "r":
self._init_read_gz()
else:
@@ -458,7 +458,7 @@ class _Stream:
"""Write string s to the stream.
"""
if self.comptype == "gz":
- self.crc = self.zlib.crc32(s, self.crc)
+ self.crc = self.zlib.crc32(s, self.crc) & 0xffffffffL
self.pos += len(s)
if self.comptype != "tar":
s = self.cmp.compress(s)