Autopkgtest fails against curl 7.83 (multi-line header support)

[Olivier Gayot]

Autopkgtest fails for kinetic:

======================================================================
ERROR: test_multi_line_headers (tornado.test.curl_httpclient_test.CurlHTTPClientCommonTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/tornado/testing.py", line 98, in __call__
    result = self.orig_method(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/tornado/test/httpclient_test.py", line 534, in test_multi_line_headers
    resp = self.fetch("http://127.0.0.1:%d/" % port)
  File "/usr/lib/python3/dist-packages/tornado/testing.py", line 443, in fetch
    return self.io_loop.run_sync(
  File "/usr/lib/python3/dist-packages/tornado/ioloop.py", line 530, in run_sync
    return future_cell[0].result()
tornado.curl_httpclient.CurlError: HTTP 599: Header without colon

this seems to be caused by a regression in curl 7.83:
https://github.com/curl/curl/issues/8844

I created the following bug report at tornado upstream to follow up
https://github.com/tornadoweb/tornado/issues/3143

[Olivier Gayot (ogayot)]

Test was removed from opensuse: https://<email address hidden>/msg42154.html

[Olivier Gayot (ogayot)]

A fix was merged into curl. Next upstream version of curl should hopefully fix the issue.

[Jeremy Bícha (jbicha)]

https://autopkgtest.ubuntu.com/packages/python-tornado