Expected behavior: git apply -N foo.patch applies a patch to the worktree, additionally adding 'new file' entries in the patch to the index as intent-to-add entries. Actual behavior: git apply -N foo.patch overwrites the entire index, so that after the command it *only* contains the intent-to-add entries added by the patch, and nothing else. (It still applies properly to the worktree.) I am looking at apply.c to figure out why this happens, but thought a report to the list was warranted; any thoughts from someone more familiar with this machinery would be helpful. I went back in the history and this seems to have happened since the feature was first added (ac997db0, Merge branch 'nd/diff-apply-ita').
