Matt Bogosian added the comment:
After some consideration, I think this is probably more correct:
```
--- /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/tarfile.py
2016-12-17 12:41:21.000000000 -0800
+++ tarfile.py 2017-03-10 14:57:15.000000000 -0800
@@ -2347,9 +2347,10 @@
# Advance the file pointer.
if self.offset != self.fileobj.tell():
- self.fileobj.seek(self.offset - 1)
+ self.fileobj.seek(max(self.offset - 1, 0))
if not self.fileobj.read(1):
raise ReadError("unexpected end of data")
+ self.fileobj.seek(self.offset)
# Read the next block.
tarinfo = None
```
But again, I'm no expert here.
----------
Added file: http://bugs.python.org/file46719/tarfile.patch
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<http://bugs.python.org/issue29760>
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