convert: svn: defer get_log parsing until after get_log completes. According to the documentation, it is not safe to perform any other operation on the ra object until get_log completes.

#!/bin/sh

hg init
python -c 'print "confuse str.splitlines\nembedded\rnewline"' > a
hg ci -Ama -d '1 0'
echo clean diff >> a
hg ci -mb -d '2 0'
hg diff -r0 -r1