This squashes two changes from Johannes and Ramsay:

diff --git a/builtin/worktree.c b/builtin/worktree.c
index 339c622e20..a1c91f1542 100644
--- a/builtin/worktree.c
+++ b/builtin/worktree.c

@@ -528,7 +528,7 @@ static int unlock_worktree(int ac, const char **av, const char *prefix)
 
 static void validate_no_submodules(const struct worktree *wt)
 {
-	struct index_state istate = {0};
+	struct index_state istate = { NULL };
 	int i, found_submodules = 0;
 
 	if (read_index_from(&istate, worktree_git_path(wt, "index")) > 0) {

diff --git a/t/t2028-worktree-move.sh b/t/t2028-worktree-move.sh
index 084acc6c6d..b3105eaaed 100755
--- a/t/t2028-worktree-move.sh
+++ b/t/t2028-worktree-move.sh

@@ -71,13 +71,14 @@ test_expect_success 'move locked worktree' '
 '
 
 test_expect_success 'move worktree' '
+	toplevel="$(pwd)" &&
 	git worktree move source destination &&
 	test_path_is_missing source &&
 	git worktree list --porcelain | grep "^worktree" >actual &&
 	cat <<-EOF >expected &&
-	worktree $TRASH_DIRECTORY
-	worktree $TRASH_DIRECTORY/destination
-	worktree $TRASH_DIRECTORY/elsewhere
+	worktree $toplevel
+	worktree $toplevel/destination
+	worktree $toplevel/elsewhere
 	EOF
 	test_cmp expected actual &&
 	git -C destination log --format=%s >actual2 &&

Nguyễn Thái Ngọc Duy (11):
  worktree.c: zero new 'struct worktree' on allocation
  worktree: reorder an if statement
  get_worktrees() must return main worktree as first item even on error
  worktree.c: get_worktrees() takes a new flag argument
  worktree list: keep the list sorted
  worktree.c: add validate_worktree()
  worktree.c: add update_worktree_location()
  worktree move: new command
  worktree move: accept destination as directory
  worktree move: refuse to move worktrees with submodules
  worktree remove: new command

 Documentation/git-worktree.txt         |  28 ++++--
 branch.c                               |   2 +-
 builtin/branch.c                       |   2 +-
 builtin/worktree.c                     | 176 +++++++++++++++++++++++++++++++--
 contrib/completion/git-completion.bash |   5 +-
 t/t2027-worktree-list.sh               |  40 ++++++++
 t/t2028-worktree-move.sh               |  57 +++++++++++
 worktree.c                             | 126 +++++++++++++++++++----
 worktree.h                             |  15 ++-
 9 files changed, 410 insertions(+), 41 deletions(-)

-- 
2.11.0.157.gd943d85