Github user maskit commented on the pull request:
https://github.com/apache/trafficserver/pull/549#issuecomment-205336202
I couldn't have a time to dig into the issue but it seems the real problem
here is that ``has_body()`` has a side effect. It initializes
``resp_content_length``, and there is a logic depends on the effect.
We should check whether ``resp_content_length`` has already been
initialized before use. Or similar problems would happen if someone add a check
into ``has_body()``.
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