git -C B prune
'
+test_expect_success 'prune: handle index in multiple worktrees' '
+ git worktree add second-worktree &&
+ echo "new blob for second-worktree" >second-worktree/blob &&
+ git -C second-worktree add blob &&
+ git prune --expire=now &&
+ git -C second-worktree show :blob >actual &&
+ test_cmp second-worktree/blob actual
+'
+
+test_expect_success 'prune: handle HEAD in multiple worktrees' '
+ git worktree add --detach third-worktree &&
+ echo "new blob for third-worktree" >third-worktree/blob &&
+ git -C third-worktree add blob &&
+ git -C third-worktree commit -m "third" &&
+ rm .git/worktrees/third-worktree/index &&
+ test_must_fail git -C third-worktree show :blob &&
+ git prune --expire=now &&
+ git -C third-worktree show HEAD:blob >actual &&
+ test_cmp third-worktree/blob actual
+'
+
+test_expect_success 'prune: handle HEAD reflog in multiple worktrees' '
+ git config core.logAllRefUpdates true &&
+ echo "lost blob for third-worktree" >expected &&
+ (
+ cd third-worktree &&
+ cat ../expected >blob &&
+ git add blob &&
+ git commit -m "second commit in third" &&
+ git reset --hard HEAD^
+ ) &&
+ git prune --expire=now &&
+ SHA1=`git hash-object expected` &&
+ git -C third-worktree show "$SHA1" >actual &&
+ test_cmp expected actual
+'
+
test_done