Failure in t6021 on Red Hat Enterprise Linux 4

Running t/t6021-crisscross-merge.sh -v -i on Red Hat Enterprise Linux 4 Workstation with
python 2.3.4 installed, I found a fatal error in the test.

Apparently, this release of python doesn't have the subprocess module installed. In what
package is that located? How can I fix this error?

Thanks!

--Mark

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[mallen@mrhat t]$ rpm -q python
python-2.3.4-14.1

...SNIP...

git commit -m D8 file
Committing initial tree ec103796f9a6ca8367bd90cd88edf39c5dd2ae26
Trying really trivial in-index merge...
fatal: Merge requires file-level merging
Nope.
Traceback (most recent call last):
  File "/home/mallen/git/git.git/t/../git-merge-recursive", line 13, in ?
    from gitMergeCommon import *
  File "/home/mallen/git/git.git/gitMergeCommon.py", line 18, in ?
    import subprocess
ImportError: No module named subprocess
Automatic merge failed/prevented; fix up by hand

...SNIP...

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