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
echo a > a
hg ci -Am t

hg mv a b
hg ci -Am t1
hg debugrename b

hg mv b a
hg ci -Am t2
hg debugrename a

echo % test with --rev
hg debugrename --rev 1 b