On 17 Nov. 2016, at 18:22, Glyph Lefkowitz <glyph@twistedmatrix.com> wrote:

On Nov 16, 2016, at 11:15 PM, Mark Williams <markrwilliams@gmail.com> wrote:

On Thu, Nov 10, 2016 at 07:56:52PM +1100, Amber "Hawkie" Brown wrote:

- Python 3 support for Words' IRC support and twisted.protocols.sip among some smaller modules,

I have opened a PR to revert this:

https://github.com/twisted/twisted/pull/593

A full explanation is here:

https://twistedmatrix.com/trac/ticket/6320#comment:16

In summary: a valid IRC message will cause a UnicodeDecodeError within
the event loop that a user cannot handle or avoid, and all length
checks on line sizes are wrong because they occur prior to encoding to
utf-8.

Reverts should be commits that go straight to trunk and reopen tickets, per the current process.

However; is it really a regression to have py3 support for Words that just doesn't support other encodings yet?  It strikes me that this is just a bug, and that we should just fall back from UTF-8 to latin-1 in this scenario.  But adding that fallback is a small additional fix (perhaps one that should be slated for 16.6.0 if you want to make it).

-glyph