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https://issues.apache.org/jira/browse/SINGA-283?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15754450#comment-15754450
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ASF subversion and git services commented on SINGA-283:
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Commit 7956019cf326c5f84401551f31f1e597fba77d46 in incubator-singa's branch
refs/heads/master from [~wangwei.cs]
[ https://git-wip-us.apache.org/repos/asf?p=incubator-singa.git;h=7956019 ]
SINGA-283 Fix a bug of net.py backward function for layers with multiple inputs
1. reversed(list) returns a reversedlistiterator, it should return a list.
fixed by using list[::-1]
2. add debugging output for backward function
> Fix a bug of net.py backward function for layers with multiple inputs
> ---------------------------------------------------------------------
>
> Key: SINGA-283
> URL: https://issues.apache.org/jira/browse/SINGA-283
> Project: Singa
> Issue Type: Bug
> Reporter: wangwei
> Assignee: wangwei
>
> For layers with multiple inputs, their source layers are visited in the
> reversed order, e.g., s1, s2, s3 -> o (forward), => o, s3, s2, s1
> (backward). Consequently, we need to reverse the order of the output
> gradients of o.
> There is a bug of the reverse operation.
> It could be fixed by: reverse(list) --> list[::-1], the first one returns a
> reverselistiterator instead of a list.
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