sub begin_convert_from () {
my $head = get_head();
+ my ($ffqs, $ffqm, $symref, $ffq_prev, $gdrlast) = ffq_prev_branchinfo();
+
+ fail "ffq-prev exists, this is already managed by git-debrebase!"
+ if $ffq_prev && git_get_ref $ffq_prev;
+
+ my $gdrlast_obj = $gdrlast && git_get_ref $gdrlast;
+ snag 'already-converted',
+ "ahead of debrebase-last, this is already managed by git-debrebase!"
+ if $gdrlast_obj && is_fast_fwd $gdrlast_obj, $head;
return ($head, undef);
}