[issue4325] Installer crash on cancel installation.

[dreamlusion]

New submission from dreamlusion <dreamlusion at gmail.com>:

Steps to reproduce:

1. Start the installer (python-2.6.msi)
2. Choose install for all users, next.
3. Select default directory, next.
4. Click "Advanced".
5. Click "Cancel" and confirm (click yes).
Bang.

----------
components: Installation
messages: 75865
nosy: dreamlusion
severity: normal
status: open
title: Installer crash on cancel installation.
versions: Python 2.6

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue4325>
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