Missing header on "fetch --headers" output

[Marcus]

The command fetch doesn't seem to report all of the response headers as expected.

Scenario: fresh install of scrapy 0.18.4 with no custom settings, run the command fetch with added option --headers on any URL.

Checking the reported response headers and adding the response body size, the sum of their contents (in bytes) does not match the value reported by 'downloader/response_bytes'.

Of course I've ignored the ">" and "<" and added the extra \r\n that the response headers always sends.

So, I've noticed that the difference in the value reported by 'downloader/response_bytes' and the resulting body+header is down to a single missing response.header.

By missing header I mean, a header not output by the fetch command.

[Pablo Hoffman]

Which header was that?. Is there a way to reproduce it with a specific url  without any other dependencies?. If this is the case, you should open a defect in github.

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