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

mkdir t
cd t
hg init
echo a > a
hg add a
hg commit -m test -d "1000000 0"
hg history
hg manifest --debug
hg cat a
hg verify