+> Retitled this bug report since it seems to be specific to Python 3.
+>
+> The `rst` plugin is probably more commonly used with Python 2.
+> It seems likely that there is some Python-3-specific bug in `proxy.py`,
+> perhaps introduced by [commit 154c4ea
+ "properly encode and decode from/to utf8 when sending rpc to ikiwiki"](
+http://source.ikiwiki.branchable.com/?p=source.git;a=commitdiff;h=154c4ea9e65d033756330a7f8c5c0fa285380bf0).
+>
+> I can reproduce this on Debian by installing `python3-docutils`
+> and changing the first line of `plugins/proxy.py`, the first
+> line of `plugins/pythondemo`, the first line of `plugins/rst`
+> and the `system()` call in `t/rst.t` to use `python3` instead
+> of `python`. --[[smcv]]
+