[Buildbot] #3071: /builds/:id/changes returns error

[Buildbot trac]

#3071: /builds/:id/changes returns error
-------------------+--------------------
Reporter:  Ben     |       Owner:
    Type:  defect  |      Status:  new
Priority:  major   |   Milestone:  0.9.0
 Version:  master  |  Resolution:
Keywords:  data    |
-------------------+--------------------
Description changed by sa2ajj:

Old description:

> Nothing in twisted log, but when visiting the URL in a browser, I get
> this:
>
> {{{
> {"error": "TypeError(\"'NoneType' object has no attribute
> '__getitem__'\",)"}
> }}}
>
> I don;t know where to look at ... __getitem__ is pretty generic

New description:

 Nothing in twisted log, but when visiting the URL in a browser, I get
 this:

 {{{
 {"error": "TypeError(\"'NoneType' object has no attribute
 '__getitem__'\",)"}
 }}}

 I don;t know where to look at ... `__getitem__` is pretty generic

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Ticket URL: <http://trac.buildbot.net/ticket/3071#comment:1>
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