Created attachment 334442 [details]
snippet of log with traceback on yum.misc.unique()

Description of problem:

in branch yum-3_2_X, commit 12d9d60702a41a55bce19e01bb3151cfff0c31f0 [1] seems to have caused situations in which u is referenced before it is defined, causing a traceback[2] when using yum.misc.unique().

[1] http://yum.baseurl.org/gitweb?p=yum.git;a=commitdiff;h=12d9d60702a41a55bce19e01bb3151cfff0c31f0

[2] http://www.kanarip.com/revisor/20090308/rawhide-i386-respin/log/revisor-rawhide-i386-respin.log (near the end, snippet attached)

Version-Release number of selected component (if applicable):

yum.noarch 0:3.2.21-12.fc11

How reproducible:

Run revisor in respin mode so that it calls yum.misc.unique()

Steps to Reproduce:
1. Create a transaction with a few packages (~2400)
2. Get all the requirements for these packages, similar to:

    reqs = []
    for txmbr in yumobj.tsInfo.getMembers():
        reqs.append(txmbr.po.requires)
    reqs = yum.misc.unique(reqs)

3. A traceback is the result