[yt-svn] [yt_analysis/yt] derived quantity with only one intermediate return value fails (issue #388)

[mqk]

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New issue 388: derived quantity with only one intermediate return value fails
https://bitbucket.org/yt_analysis/yt/issue/388/derived-quantity-with-only-one

mqk:

When I create a derived quantity with only one return value in the intermediate (pre-combiner) function, I get 'IndexError: invalid index to scalar variable'. See this example: http://pastebin.com/KNE6hbQr which produces this error: http://pastebin.com/QFLxYWhj

A work-around is to return an additional dummy value, so 'return coldgas_mass, 1' in the above example.


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