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[Bug 1163598] Re: InstanceMetadata content can be None

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: Thierry Carrez <thierry.carrez+lp@xxxxxxxxx>
Date: Wed, 29 May 2013 10:27:55 -0000
Reply-to: Bug 1163598 <1163598@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

** Changed in: nova
       Status: Fix Committed => Fix Released

** Changed in: nova
    Milestone: None => havana-1

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https://bugs.launchpad.net/bugs/1163598

Title:
  InstanceMetadata content can be None

Status in OpenStack Compute (Nova):
  Fix Released

Bug description:
  `content` can be passed in as None, yet there is no guard for this
  case before we iterate over it in a for loop.

  The solution is to set content to empty list if `None` is passed in.

  This also fixes the fact that we're using a mutable arg as a default,
  which is bad practice.

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