tests/test-issue436

convert: Using --dest-type svn crashed, if the source repo used tags.

The convert extension requires puttags(self, tags) to return a sequence
for a multi-variable assignment.  If puttags implicitly returns None,
the code will break when trying to un-pack None for assignment.

#!/bin/sh

hg init a
cd a
hg -v log -v
hg -v log -v x
true