hippotatd: catch errors from request.finish in _req_cancel
authorIan Jackson <ijackson@chiark.greenend.org.uk>
Sun, 23 Apr 2017 19:51:21 +0000 (20:51 +0100)
committerIan Jackson <ijackson@chiark.greenend.org.uk>
Sun, 23 Apr 2017 19:51:21 +0000 (20:51 +0100)
It is not completely clear when it is necessary to call
request.finish.  Doing so when it is not necessary has a tendency to
throw an exception.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

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