diff --git a/Documentation/RelNotes/2.54.0.adoc b/Documentation/RelNotes/2.54.0.adoc
index 207db16b80d7a7..6425d47e00c165 100644
--- a/Documentation/RelNotes/2.54.0.adoc
+++ b/Documentation/RelNotes/2.54.0.adoc
@@ -44,6 +44,9 @@ UI, Workflows & Features
    against the tree of the (potentially quite different from the
    current working tree) given commit.
 
+ * "git add -p" learned a new mode that allows the user to revisit a
+   file that was already dealt with.
+
 
 Performance, Internal Implementation, Development Support etc.
 --------------------------------------------------------------
@@ -179,6 +182,9 @@ Fixes since v2.53
  * Update build precedure for mergetool documentation in meson-based builds.
    (merge 58e4eeeeb5 pw/meson-doc-mergetool later to maint).
 
+ * An earlier attempt to optimize "git subtree" discarded too much
+   relevant histories, which has been corrected.
+
  * Other code cleanup, docfix, build fix, etc.
    (merge d79fff4a11 jk/remote-tracking-ref-leakfix later to maint).
    (merge 7a747f972d dd/t5403-modernise later to maint).
@@ -207,3 +213,10 @@ Fixes since v2.53
    (merge 96286f14b0 ty/symlinks-use-unsigned-for-bitset later to maint).
    (merge b10e0cb1f3 kh/doc-am-xref later to maint).
    (merge ed84bc1c0d kh/doc-patch-id-4 later to maint).
+   (merge 7451864bfa sc/pack-redundant-leakfix later to maint).
+
+ * A prefetch call can be triggered to access a stale diff_queue entry
+   after diffcore-break breaks a filepair into two and freed the
+   original entry that is no longer used, leading to a segfault, which
+   has been corrected.
+   (merge 2d88ab078d hy/diff-lazy-fetch-with-break-fix later to maint).
diff --git a/add-interactive.c b/add-interactive.c
index 95ec5a89f8c3d3..158063968266ad 100644
--- a/add-interactive.c
+++ b/add-interactive.c
@@ -64,6 +64,7 @@ void init_add_i_state(struct add_i_state *s, struct repository *r,
 	s->r = r;
 	s->context = -1;
 	s->interhunkcontext = -1;
+	s->auto_advance = add_p_opt->auto_advance;
 
 	s->use_color_interactive = check_color_config(r, "color.interactive");
 
@@ -1017,6 +1018,7 @@ static int run_patch(struct add_i_state *s, const struct pathspec *ps,
 		struct add_p_opt add_p_opt = {
 			.context = s->context,
 			.interhunkcontext = s->interhunkcontext,
+			.auto_advance = s->auto_advance
 		};
 		struct strvec args = STRVEC_INIT;
 		struct pathspec ps_selected = { 0 };
diff --git a/add-interactive.h b/add-interactive.h
index da49502b7656f4..784339777509f7 100644
--- a/add-interactive.h
+++ b/add-interactive.h
@@ -6,9 +6,10 @@
 struct add_p_opt {
 	int context;
 	int interhunkcontext;
+	int auto_advance;
 };
 
-#define ADD_P_OPT_INIT { .context = -1, .interhunkcontext = -1 }
+#define ADD_P_OPT_INIT { .context = -1, .interhunkcontext = -1, .auto_advance = 1 }
 
 struct add_i_state {
 	struct repository *r;
@@ -29,6 +30,7 @@ struct add_i_state {
 	int use_single_key;
 	char *interactive_diff_filter, *interactive_diff_algorithm;
 	int context, interhunkcontext;
+	int auto_advance;
 };
 
 void init_add_i_state(struct add_i_state *s, struct repository *r,
diff --git a/add-patch.c b/add-patch.c
index 49d6911a32c711..8c03f710d380c1 100644
--- a/add-patch.c
+++ b/add-patch.c
@@ -1418,7 +1418,44 @@ N_("j - go to the next undecided hunk, roll over at the bottom\n"
    "e - manually edit the current hunk\n"
    "p - print the current hunk\n"
    "P - print the current hunk using the pager\n"
-   "? - print help\n");
+   "> - go to the next file, roll over at the bottom\n"
+   "< - go to the previous file, roll over at the top\n"
+   "? - print help\n"
+   "HUNKS SUMMARY - Hunks: %d, USE: %d, SKIP: %d\n");
+
+static void apply_patch(struct add_p_state *s, struct file_diff *file_diff)
+{
+	struct child_process cp = CHILD_PROCESS_INIT;
+	size_t j;
+
+	/* Any hunk to be used? */
+	for (j = 0; j < file_diff->hunk_nr; j++)
+		if (file_diff->hunk[j].use == USE_HUNK)
+			break;
+
+	if (j < file_diff->hunk_nr ||
+		(!file_diff->hunk_nr && file_diff->head.use == USE_HUNK)) {
+		/* At least one hunk selected: apply */
+		strbuf_reset(&s->buf);
+		reassemble_patch(s, file_diff, 0, &s->buf);
+
+		discard_index(s->s.r->index);
+		if (s->mode->apply_for_checkout)
+			apply_for_checkout(s, &s->buf,
+					s->mode->is_reverse);
+		else {
+			setup_child_process(s, &cp, "apply", NULL);
+			strvec_pushv(&cp.args, s->mode->apply_args);
+			if (pipe_command(&cp, s->buf.buf, s->buf.len,
+					NULL, 0, NULL, 0))
+				error(_("'git apply' failed"));
+		}
+		if (repo_read_index(s->s.r) >= 0)
+			repo_refresh_and_write_index(s->s.r, REFRESH_QUIET, 0,
+							1, NULL, NULL, NULL);
+	}
+
+}
 
 static size_t dec_mod(size_t a, size_t m)
 {
@@ -1441,20 +1478,21 @@ static bool get_first_undecided(const struct file_diff *file_diff, size_t *idx)
 	return false;
 }
 
-static int patch_update_file(struct add_p_state *s,
-			     struct file_diff *file_diff)
+static size_t patch_update_file(struct add_p_state *s, size_t idx)
 {
 	size_t hunk_index = 0;
 	ssize_t i, undecided_previous, undecided_next, rendered_hunk_index = -1;
 	struct hunk *hunk;
 	char ch;
-	struct child_process cp = CHILD_PROCESS_INIT;
-	int colored = !!s->colored.len, quit = 0, use_pager = 0;
+	int colored = !!s->colored.len, use_pager = 0;
 	enum prompt_mode_type prompt_mode_type;
+	int all_decided = 0;
+	struct file_diff *file_diff = s->file_diff + idx;
+	size_t patch_update_resp = idx;
 
 	/* Empty added files have no hunks */
 	if (!file_diff->hunk_nr && !file_diff->added)
-		return 0;
+		return patch_update_resp + 1;
 
 	strbuf_reset(&s->buf);
 	render_diff_header(s, file_diff, colored, &s->buf);
@@ -1468,7 +1506,9 @@ static int patch_update_file(struct add_p_state *s,
 			ALLOW_GOTO_NEXT_UNDECIDED_HUNK = 1 << 3,
 			ALLOW_SEARCH_AND_GOTO = 1 << 4,
 			ALLOW_SPLIT = 1 << 5,
-			ALLOW_EDIT = 1 << 6
+			ALLOW_EDIT = 1 << 6,
+			ALLOW_GOTO_PREVIOUS_FILE = 1 << 7,
+			ALLOW_GOTO_NEXT_FILE = 1 << 8
 		} permitted = 0;
 
 		if (hunk_index >= file_diff->hunk_nr)
@@ -1499,9 +1539,14 @@ static int patch_update_file(struct add_p_state *s,
 
 		/* Everything decided? */
 		if (undecided_previous < 0 && undecided_next < 0 &&
-		    hunk->use != UNDECIDED_HUNK)
-			break;
-
+		    hunk->use != UNDECIDED_HUNK) {
+				if (!s->s.auto_advance)
+					all_decided = 1;
+				else {
+					patch_update_resp++;
+					break;
+				}
+		}
 		strbuf_reset(&s->buf);
 		if (file_diff->hunk_nr) {
 			if (rendered_hunk_index != hunk_index) {
@@ -1549,6 +1594,14 @@ static int patch_update_file(struct add_p_state *s,
 				permitted |= ALLOW_EDIT;
 				strbuf_addstr(&s->buf, ",e");
 			}
+			if (!s->s.auto_advance && s->file_diff_nr > 1) {
+				permitted |= ALLOW_GOTO_NEXT_FILE;
+				strbuf_addstr(&s->buf, ",>");
+			}
+			if (!s->s.auto_advance && s->file_diff_nr > 1) {
+				permitted |= ALLOW_GOTO_PREVIOUS_FILE;
+				strbuf_addstr(&s->buf, ",<");
+			}
 			strbuf_addstr(&s->buf, ",p,P");
 		}
 		if (file_diff->deleted)
@@ -1577,7 +1630,7 @@ static int patch_update_file(struct add_p_state *s,
 			fputs(s->s.reset_color_interactive, stdout);
 		fflush(stdout);
 		if (read_single_character(s) == EOF) {
-			quit = 1;
+			patch_update_resp = s->file_diff_nr;
 			break;
 		}
 
@@ -1623,8 +1676,30 @@ static int patch_update_file(struct add_p_state *s,
 				hunk->use = SKIP_HUNK;
 			}
 		} else if (ch == 'q') {
-			quit = 1;
+			patch_update_resp = s->file_diff_nr;
 			break;
+		} else if (!s->s.auto_advance && s->answer.buf[0] == '>') {
+			if (permitted & ALLOW_GOTO_NEXT_FILE) {
+				if (patch_update_resp == s->file_diff_nr - 1)
+					patch_update_resp = 0;
+				else
+					patch_update_resp++;
+				break;
+			} else {
+				err(s, _("No next file"));
+				continue;
+			}
+		} else if (!s->s.auto_advance && s->answer.buf[0] == '<') {
+			if (permitted & ALLOW_GOTO_PREVIOUS_FILE) {
+				if (patch_update_resp == 0)
+					patch_update_resp = s->file_diff_nr - 1;
+				else
+					patch_update_resp--;
+				break;
+			} else {
+				err(s, _("No previous file"));
+				continue;
+			}
 		} else if (s->answer.buf[0] == 'K') {
 			if (permitted & ALLOW_GOTO_PREVIOUS_HUNK)
 				hunk_index = dec_mod(hunk_index,
@@ -1770,6 +1845,18 @@ static int patch_update_file(struct add_p_state *s,
 				 * commands shown in the prompt that are not
 				 * always available.
 				 */
+				if (all_decided && !strncmp(p, "HUNKS SUMMARY", 13)) {
+					int total = file_diff->hunk_nr, used = 0, skipped = 0;
+
+					for (i = 0; i < file_diff->hunk_nr; i++) {
+						if (file_diff->hunk[i].use == USE_HUNK)
+							used += 1;
+						if (file_diff->hunk[i].use == SKIP_HUNK)
+							skipped += 1;
+					}
+					color_fprintf_ln(stdout, s->s.help_color, _(p),
+							 total, used, skipped);
+				}
 				if (*p != '?' && !strchr(s->buf.buf, *p))
 					continue;
 
@@ -1782,35 +1869,11 @@ static int patch_update_file(struct add_p_state *s,
 		}
 	}
 
-	/* Any hunk to be used? */
-	for (i = 0; i < file_diff->hunk_nr; i++)
-		if (file_diff->hunk[i].use == USE_HUNK)
-			break;
-
-	if (i < file_diff->hunk_nr ||
-	    (!file_diff->hunk_nr && file_diff->head.use == USE_HUNK)) {
-		/* At least one hunk selected: apply */
-		strbuf_reset(&s->buf);
-		reassemble_patch(s, file_diff, 0, &s->buf);
-
-		discard_index(s->s.r->index);
-		if (s->mode->apply_for_checkout)
-			apply_for_checkout(s, &s->buf,
-					   s->mode->is_reverse);
-		else {
-			setup_child_process(s, &cp, "apply", NULL);
-			strvec_pushv(&cp.args, s->mode->apply_args);
-			if (pipe_command(&cp, s->buf.buf, s->buf.len,
-					 NULL, 0, NULL, 0))
-				error(_("'git apply' failed"));
-		}
-		if (repo_read_index(s->s.r) >= 0)
-			repo_refresh_and_write_index(s->s.r, REFRESH_QUIET, 0,
-						     1, NULL, NULL, NULL);
-	}
+	if (s->s.auto_advance)
+		apply_patch(s, file_diff);
 
 	putchar('\n');
-	return quit;
+	return patch_update_resp;
 }
 
 int run_add_p(struct repository *r, enum add_p_mode mode,
@@ -1859,11 +1922,18 @@ int run_add_p(struct repository *r, enum add_p_mode mode,
 		return -1;
 	}
 
-	for (i = 0; i < s.file_diff_nr; i++)
-		if (s.file_diff[i].binary && !s.file_diff[i].hunk_nr)
+	for (i = 0; i < s.file_diff_nr;) {
+		if (s.file_diff[i].binary && !s.file_diff[i].hunk_nr) {
 			binary_count++;
-		else if (patch_update_file(&s, s.file_diff + i))
+			i++;
+			continue;
+		}
+		 if ((i = patch_update_file(&s, i)) == s.file_diff_nr)
 			break;
+    }
+	if (!s.s.auto_advance)
+		for (i = 0; i < s.file_diff_nr; i++)
+			apply_patch(&s, s.file_diff + i);
 
 	if (s.file_diff_nr == 0)
 		err(&s, _("No changes."));
diff --git a/builtin/add.c b/builtin/add.c
index 32709794b3873f..4357f87b7f807b 100644
--- a/builtin/add.c
+++ b/builtin/add.c
@@ -256,6 +256,8 @@ static struct option builtin_add_options[] = {
 	OPT_GROUP(""),
 	OPT_BOOL('i', "interactive", &add_interactive, N_("interactive picking")),
 	OPT_BOOL('p', "patch", &patch_interactive, N_("select hunks interactively")),
+	OPT_BOOL(0, "auto-advance", &add_p_opt.auto_advance,
+		 N_("auto advance to the next file when selecting hunks interactively")),
 	OPT_DIFF_UNIFIED(&add_p_opt.context),
 	OPT_DIFF_INTERHUNK_CONTEXT(&add_p_opt.interhunkcontext),
 	OPT_BOOL('e', "edit", &edit_interactive, N_("edit current diff and apply")),
@@ -418,6 +420,8 @@ int cmd_add(int argc,
 			die(_("the option '%s' requires '%s'"), "--unified", "--interactive/--patch");
 		if (add_p_opt.interhunkcontext != -1)
 			die(_("the option '%s' requires '%s'"), "--inter-hunk-context", "--interactive/--patch");
+		if (!add_p_opt.auto_advance)
+			die(_("the option '%s' requires '%s'"), "--no-auto-advance", "--interactive/--patch");
 	}
 
 	if (edit_interactive) {
diff --git a/builtin/checkout.c b/builtin/checkout.c
index 7d63e7292483db..eefefd5d0fe6d5 100644
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -47,6 +47,7 @@ struct checkout_opts {
 	int patch_mode;
 	int patch_context;
 	int patch_interhunk_context;
+	int auto_advance;
 	int quiet;
 	int merge;
 	int force;
@@ -95,6 +96,7 @@ struct checkout_opts {
 	.merge = -1, \
 	.patch_context = -1, \
 	.patch_interhunk_context = -1, \
+	.auto_advance = 1, \
 }
 
 struct branch_info {
@@ -533,6 +535,7 @@ static int checkout_paths(const struct checkout_opts *opts,
 		struct add_p_opt add_p_opt = {
 			.context = opts->patch_context,
 			.interhunkcontext = opts->patch_interhunk_context,
+			.auto_advance = opts->auto_advance
 		};
 		const char *rev = new_branch_info->name;
 		char rev_oid[GIT_MAX_HEXSZ + 1];
@@ -1845,6 +1848,8 @@ static int checkout_main(int argc, const char **argv, const char *prefix,
 			die(_("the option '%s' requires '%s'"), "--unified", "--patch");
 		if (opts->patch_interhunk_context != -1)
 			die(_("the option '%s' requires '%s'"), "--inter-hunk-context", "--patch");
+		if (!opts->auto_advance)
+			die(_("the option '%s' requires '%s'"), "--no-auto-advance", "--patch");
 	}
 
 	if (opts->show_progress < 0) {
@@ -2043,6 +2048,8 @@ int cmd_checkout(int argc,
 		OPT_BOOL(0, "guess", &opts.dwim_new_local_branch,
 			 N_("second guess 'git checkout <no-such-branch>' (default)")),
 		OPT_BOOL(0, "overlay", &opts.overlay_mode, N_("use overlay mode (default)")),
+		OPT_BOOL(0, "auto-advance", &opts.auto_advance,
+			 N_("auto advance to the next file when selecting hunks interactively")),
 		OPT_END()
 	};
 
diff --git a/builtin/pack-redundant.c b/builtin/pack-redundant.c
index e4ecf774ca6405..86749bb7e77ae7 100644
--- a/builtin/pack-redundant.c
+++ b/builtin/pack-redundant.c
@@ -546,8 +546,10 @@ static struct pack_list * add_pack(struct packed_git *p)
 	l.pack = p;
 	llist_init(&l.remaining_objects);
 
-	if (open_pack_index(p))
+	if (open_pack_index(p)) {
+		llist_free(l.remaining_objects);
 		return NULL;
+	}
 
 	base = p->index_data;
 	base += 256 * 4 + ((p->index_version < 2) ? 4 : 8);
diff --git a/builtin/reset.c b/builtin/reset.c
index c48d9845f8425e..88f95f9fc7aa9e 100644
--- a/builtin/reset.c
+++ b/builtin/reset.c
@@ -371,6 +371,8 @@ int cmd_reset(int argc,
 			       PARSE_OPT_OPTARG,
 			       option_parse_recurse_submodules_worktree_updater),
 		OPT_BOOL('p', "patch", &patch_mode, N_("select hunks interactively")),
+		OPT_BOOL(0, "auto-advance", &add_p_opt.auto_advance,
+			 N_("auto advance to the next file when selecting hunks interactively")),
 		OPT_DIFF_UNIFIED(&add_p_opt.context),
 		OPT_DIFF_INTERHUNK_CONTEXT(&add_p_opt.interhunkcontext),
 		OPT_BOOL('N', "intent-to-add", &intent_to_add,
@@ -443,6 +445,8 @@ int cmd_reset(int argc,
 			die(_("the option '%s' requires '%s'"), "--unified", "--patch");
 		if (add_p_opt.interhunkcontext != -1)
 			die(_("the option '%s' requires '%s'"), "--inter-hunk-context", "--patch");
+		if (!add_p_opt.auto_advance)
+			die(_("the option '%s' requires '%s'"), "--no-auto-advance", "--patch");
 	}
 
 	/* git reset tree [--] paths... can be used to
diff --git a/builtin/stash.c b/builtin/stash.c
index f06cfa79894cae..e79d612e572e7c 100644
--- a/builtin/stash.c
+++ b/builtin/stash.c
@@ -1849,6 +1849,8 @@ static int push_stash(int argc, const char **argv, const char *prefix,
 			 N_("stash staged changes only")),
 		OPT_BOOL('p', "patch", &patch_mode,
 			 N_("stash in patch mode")),
+		OPT_BOOL(0, "auto-advance", &add_p_opt.auto_advance,
+			 N_("auto advance to the next file when selecting hunks interactively")),
 		OPT_DIFF_UNIFIED(&add_p_opt.context),
 		OPT_DIFF_INTERHUNK_CONTEXT(&add_p_opt.interhunkcontext),
 		OPT__QUIET(&quiet, N_("quiet mode")),
@@ -1911,6 +1913,8 @@ static int push_stash(int argc, const char **argv, const char *prefix,
 			die(_("the option '%s' requires '%s'"), "--unified", "--patch");
 		if (add_p_opt.interhunkcontext != -1)
 			die(_("the option '%s' requires '%s'"), "--inter-hunk-context", "--patch");
+		if (!add_p_opt.auto_advance)
+			die(_("the option '%s' requires '%s'"), "--no-auto-advance", "--patch");
 	}
 
 	if (add_p_opt.context < -1)
@@ -1952,6 +1956,8 @@ static int save_stash(int argc, const char **argv, const char *prefix,
 			 N_("stash staged changes only")),
 		OPT_BOOL('p', "patch", &patch_mode,
 			 N_("stash in patch mode")),
+		OPT_BOOL(0, "auto-advance", &add_p_opt.auto_advance,
+			 N_("auto advance to the next file when selecting hunks interactively")),
 		OPT_DIFF_UNIFIED(&add_p_opt.context),
 		OPT_DIFF_INTERHUNK_CONTEXT(&add_p_opt.interhunkcontext),
 		OPT__QUIET(&quiet, N_("quiet mode")),
@@ -1983,6 +1989,8 @@ static int save_stash(int argc, const char **argv, const char *prefix,
 			die(_("the option '%s' requires '%s'"), "--unified", "--patch");
 		if (add_p_opt.interhunkcontext != -1)
 			die(_("the option '%s' requires '%s'"), "--inter-hunk-context", "--patch");
+		if (!add_p_opt.auto_advance)
+			die(_("the option '%s' requires '%s'"), "--no-auto-advance", "--patch");
 	}
 
 	ret = do_push_stash(&ps, stash_msg, quiet, keep_index,
diff --git a/contrib/subtree/git-subtree.sh b/contrib/subtree/git-subtree.sh
index d7f9121f2f8ee9..791fd8260c4703 100755
--- a/contrib/subtree/git-subtree.sh
+++ b/contrib/subtree/git-subtree.sh
@@ -788,42 +788,6 @@ ensure_valid_ref_format () {
 		die "fatal: '$1' does not look like a ref"
 }
 
-# Usage: should_ignore_subtree_split_commit REV
-#
-# Check if REV is a commit from another subtree and should be
-# ignored from processing for splits
-should_ignore_subtree_split_commit () {
-	assert test $# = 1
-
-	git show \
-		--no-patch \
-		--no-show-signature \
-		--format='%(trailers:key=git-subtree-dir,key=git-subtree-mainline)' \
-		"$1" |
-	(
-	have_mainline=
-	subtree_dir=
-
-	while read -r trailer val
-	do
-		case "$trailer" in
-		git-subtree-dir:)
-			subtree_dir="${val%/}" ;;
-		git-subtree-mainline:)
-			have_mainline=y ;;
-		esac
-	done
-
-	if test -n "${subtree_dir}" &&
-		test -z "${have_mainline}" &&
-		test "${subtree_dir}" != "$arg_prefix"
-	then
-		return 0
-	fi
-	return 1
-	)
-}
-
 # Usage: process_split_commit REV PARENTS
 process_split_commit () {
 	assert test $# = 2
@@ -1015,19 +979,7 @@ cmd_split () {
 	eval "$grl" |
 	while read rev parents
 	do
-		if should_ignore_subtree_split_commit "$rev"
-		then
-			continue
-		fi
-		parsedparents=''
-		for parent in $parents
-		do
-			if ! should_ignore_subtree_split_commit "$parent"
-			then
-				parsedparents="$parsedparents$parent "
-			fi
-		done
-		process_split_commit "$rev" "$parsedparents"
+		process_split_commit "$rev" "$parents"
 	done || exit $?
 
 	latest_new=$(cache_get latest_new) || exit $?
diff --git a/contrib/subtree/t/t7900-subtree.sh b/contrib/subtree/t/t7900-subtree.sh
index 8024703cad90e8..18d2b564487e91 100755
--- a/contrib/subtree/t/t7900-subtree.sh
+++ b/contrib/subtree/t/t7900-subtree.sh
@@ -433,8 +433,9 @@ test_expect_success 'split sub dir/ with --rejoin' '
 		git fetch ./"sub proj" HEAD &&
 		git subtree merge --prefix="sub dir" FETCH_HEAD &&
 		split_hash=$(git subtree split --prefix="sub dir" --annotate="*") &&
-		git subtree split --prefix="sub dir" --annotate="*" --rejoin &&
-		test "$(last_commit_subject)" = "Split '\''sub dir/'\'' into commit '\''$split_hash'\''"
+		git subtree split --prefix="sub dir" --annotate="*" -b spl --rejoin &&
+		test "$(last_commit_subject)" = "Split '\''sub dir/'\'' into commit '\''$split_hash'\''" &&
+		test "$(git rev-list --count spl)" -eq 5
 	)
 '
 
@@ -449,8 +450,7 @@ test_expect_success 'split sub dir/ with --rejoin' '
 # 	- Perform 'split' on subtree B
 # 	- Create new commits with changes to subtree A and B
 # 	- Perform split on subtree A
-# 	- Check that the commits in subtree B are not processed
-#			as part of the subtree A split
+# 	- Check for expected history
 test_expect_success 'split with multiple subtrees' '
 	subtree_test_create_repo "$test_count" &&
 	subtree_test_create_repo "$test_count/subA" &&
@@ -464,18 +464,25 @@ test_expect_success 'split with multiple subtrees' '
 	git -C "$test_count" subtree add --prefix=subADir FETCH_HEAD &&
 	git -C "$test_count" fetch ./subB HEAD &&
 	git -C "$test_count" subtree add --prefix=subBDir FETCH_HEAD &&
+	test "$(git -C "$test_count" rev-list --count main)" -eq 7 &&
 	test_create_commit "$test_count" subADir/main-subA1 &&
 	test_create_commit "$test_count" subBDir/main-subB1 &&
 	git -C "$test_count" subtree split --prefix=subADir \
-		--squash --rejoin -m "Sub A Split 1" &&
+		--squash --rejoin -m "Sub A Split 1" -b a1 &&
+	test "$(git -C "$test_count" rev-list --count main..a1)" -eq 1 &&
 	git -C "$test_count" subtree split --prefix=subBDir \
-		--squash --rejoin -m "Sub B Split 1" &&
+		--squash --rejoin -m "Sub B Split 1" -b b1 &&
+	test "$(git -C "$test_count" rev-list --count main..b1)" -eq 1 &&
 	test_create_commit "$test_count" subADir/main-subA2 &&
 	test_create_commit "$test_count" subBDir/main-subB2 &&
 	git -C "$test_count" subtree split --prefix=subADir \
-		--squash --rejoin -m "Sub A Split 2" &&
-	test "$(git -C "$test_count" subtree split --prefix=subBDir \
-		--squash --rejoin -d -m "Sub B Split 1" 2>&1 | grep -w "\[1\]")" = ""
+		--squash --rejoin -m "Sub A Split 2" -b a2 &&
+	test "$(git -C "$test_count" rev-list --count main..a2)" -eq 2 &&
+	test "$(git -C "$test_count" rev-list --count a1..a2)" -eq 1 &&
+	git -C "$test_count" subtree split --prefix=subBDir \
+		--squash --rejoin -d -m "Sub B Split 1" -b b2 &&
+	test "$(git -C "$test_count" rev-list --count main..b2)" -eq 2 &&
+	test "$(git -C "$test_count" rev-list --count b1..b2)" -eq 1
 '
 
 # When subtree split-ing a directory that has other subtree
@@ -499,6 +506,7 @@ do
 			test_path_is_file subA/file1.t &&
 			test_path_is_file subA/subB/file2.t &&
 			git subtree split --prefix=subA --branch=bsplit &&
+			test "$(git rev-list --count bsplit)" -eq 2 &&
 			git checkout bsplit &&
 			test_path_is_file file1.t &&
 			test_path_is_file subB/file2.t &&
@@ -511,6 +519,7 @@ do
 				--prefix=subA/subB mksubtree &&
 			test_path_is_file subA/subB/file3.t &&
 			git subtree split --prefix=subA --branch=bsplit &&
+			test "$(git rev-list --count bsplit)" -eq 3 &&
 			git checkout bsplit &&
 			test_path_is_file file1.t &&
 			test_path_is_file subB/file2.t &&
@@ -519,6 +528,67 @@ do
 	'
 done
 
+# Usually,
+#
+#    git subtree merge -P subA --squash f00...
+#
+# makes two commits, in this order:
+#
+# 1. Squashed 'subA/' content from commit f00...
+# 2. Merge commit (1) as 'subA'
+#
+# Commit 1 updates the subtree but does *not* rewrite paths.
+# Commit 2 rewrites all trees to start with `subA/`
+#
+# Commit 1 either has no parents or depends only on other
+# "Squashed 'subA/' content" commits.
+#
+# For merge without --squash, subtree produces just one commit:
+# a merge commit with git-subtree trailers.
+#
+# In either case, if the user rebases these commits, they will
+# still have the git-subtree-* trailers… but will NOT have
+# the layout described above.
+#
+# Test that subsequent `git subtree split` are not confused by this.
+test_expect_success 'split with rebased subtree commit' '
+	subtree_test_create_repo "$test_count" &&
+	(
+		cd "$test_count" &&
+		test_commit file0 &&
+		test_create_subtree_add \
+			. mksubtree subA file1 --squash &&
+		test_path_is_file subA/file1.t &&
+		mkdir subB &&
+		test_commit subB/bfile &&
+		git commit --amend -F - <<'EOF' &&
+Squashed '\''subB/'\'' content from commit '\''badf00da911bbe895347b4b236f5461d55dc9877'\''
+
+Simulate a cherry-picked or rebased subtree commit.
+
+git-subtree-dir: subB
+git-subtree-split: badf00da911bbe895347b4b236f5461d55dc9877
+EOF
+		test_commit subA/file2 &&
+		test_commit subB/bfile2 &&
+		git commit --amend -F - <<'EOF' &&
+Split '\''subB/'\'' into commit '\''badf00da911bbe895347b4b236f5461d55dc9877'\''
+
+Simulate a cherry-picked or rebased subtree commit.
+
+git-subtree-dir: subB
+git-subtree-mainline: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+git-subtree-split: badf00da911bbe895347b4b236f5461d55dc9877
+EOF
+		git subtree split --prefix=subA --branch=bsplit &&
+		git checkout bsplit &&
+		test_path_is_file file1.t &&
+		test_path_is_file file2.t &&
+		test "$(last_commit_subject)" = "subA/file2" &&
+		test "$(git rev-list --count bsplit)" -eq 2
+	)
+'
+
 test_expect_success 'split sub dir/ with --rejoin from scratch' '
 	subtree_test_create_repo "$test_count" &&
 	test_create_commit "$test_count" main1 &&
@@ -1597,6 +1667,116 @@ test_expect_success 'push split to subproj' '
 	)
 '
 
+# --ignore-joins must ignore mainline content outside of the
+# subtree. This test verifies that the logic in
+# `find_existing_splits()` correctly handles a `git subtree add`
+# In this test, the split history must not contain a commit titled
+#
+#     Add 'sub/' from commit ...
+#
+# see: dd21d43b58 (subtree: make --ignore-joins pay
+#      attention to adds, 2018-09-28)
+test_expect_success 'split --ignore-joins respects subtree add' '
+	subtree_test_create_repo "$test_count" &&
+	(
+		cd "$test_count" &&
+		test_commit main_must_not_be_in_subtree &&
+		test_create_subtree_add . mksubtree sub sub1 &&
+		test_commit sub/sub2 &&
+		test_commit main_must_not_be_in_subtree2 &&
+		git subtree split --prefix sub -b first_split --rejoin &&
+		test_commit sub/sub3 &&
+		no_ignore_joins="$(git subtree split --prefix sub -b no_ignore_joins)" &&
+		ignore_joins="$(git subtree split --prefix sub --ignore-joins -b ignore_joins)" &&
+		git checkout ignore_joins &&
+		test_path_is_file sub1.t &&
+		test_path_is_file sub2.t &&
+		test_path_is_file sub3.t &&
+		! test_path_is_file main_must_not_be_in_subtree.t &&
+		! test_path_is_file main_must_not_be_in_subtree2.t &&
+		test -z "$(git log -1 --grep "Add '''sub/''' from commit" ignore_joins)" &&
+		test "$no_ignore_joins" = "$ignore_joins" &&
+		test "$(git rev-list --count ignore_joins)" -eq 3;
+	)
+'
+
+# split excludes commits reachable from any previous --rejoin.
+# These ignored commits can still be the basis for new work
+# after the --rejoin. These commits must be processed, even
+# if they are excluded. Otherwise, the split history will be
+# incorrect.
+#
+# here, the merge
+#
+#     git merge --no-ff new_work_based_on_prejoin
+#
+# doesn't contain any subtree changes and so should not end
+# up in the split history. this subtree should be flat,
+# with no merges.
+#
+# see: 315a84f9aa (subtree: use commits before rejoins for
+#      splits, 2018-09-28)
+test_expect_success 'split links out-of-tree pre --rejoin commits with post --rejoin commits' '
+	subtree_test_create_repo "$test_count" &&
+	(
+		cd "$test_count" &&
+		test_commit main_must_not_be_in_subtree &&
+		mkdir sub &&
+		test_commit sub/sub1 &&
+		test_commit sub/sub2 &&
+		git subtree split --prefix sub --rejoin &&
+		test "$(git rev-list --count HEAD)" -eq 6 &&
+		git checkout sub/sub1 &&
+		git checkout -b new_work_based_on_prejoin &&
+		test_commit main_must_not_be_in_subtree2 &&
+		git checkout main &&
+		git merge --no-ff new_work_based_on_prejoin &&
+		test_commit sub/sub3 &&
+		git subtree split -d --prefix sub -b second_split &&
+		git checkout second_split &&
+		test_path_is_file sub1.t &&
+		test_path_is_file sub2.t &&
+		test_path_is_file sub3.t &&
+		! test_path_is_file main_must_not_be_in_subtree.t &&
+		! test_path_is_file main_must_not_be_in_subtree2.t &&
+		test "$(git rev-list --count --merges second_split)" -eq 0 &&
+		test "$(git rev-list --count second_split)" -eq 3;
+	)
+'
+
+# split must keep merge commits with unrelated histories, even
+# if both parents are treesame. When deciding whether or not
+# to eliminate a parent, copy_or_skip compares the merge-base
+# of each parent.
+#
+# in the split_of_merges branch:
+#
+#   * expect 4 commits
+#   * HEAD~ must be a merge
+#
+# see: 68f8ff8151 (subtree: improve decision on merges kept
+#      in split, 2018-09-28)
+test_expect_success 'split preserves merges with unrelated history' '
+	subtree_test_create_repo "$test_count" &&
+	(
+		cd "$test_count" &&
+		test_commit main_must_not_be_in_subtree &&
+		mkdir sub &&
+		test_commit sub/sub1 &&
+		git checkout --orphan new_history &&
+		git checkout sub/sub1 -- . &&
+		git add . &&
+		git commit -m "treesame history but not a merge-base" &&
+		git checkout main &&
+		git merge --allow-unrelated-histories --no-ff new_history &&
+		test "$(git rev-parse "HEAD^1^{tree}")" = "$(git rev-parse "HEAD^2^{tree}")" &&
+		test_commit sub/sub2 &&
+		git subtree split -d --prefix sub -b split_of_merges &&
+		test "$(git rev-list --count split_of_merges)" -eq 4 &&
+		test -n "$(git rev-list --merges HEAD~)";
+	)
+'
+
 #
 # This test covers 2 cases in subtree split copy_or_skip code
 # 1) Merges where one parent is a superset of the changes of the other
diff --git a/diffcore-break.c b/diffcore-break.c
index c4c2173f3096bc..9b11fe2fa0e622 100644
--- a/diffcore-break.c
+++ b/diffcore-break.c
@@ -222,6 +222,7 @@ void diffcore_break(struct repository *r, int break_score)
 				free(p); /* not diff_free_filepair(), we are
 					  * reusing one and two here.
 					  */
+				q->queue[i] = NULL;
 				continue;
 			}
 		}
diff --git a/path.c b/path.c
index d726537622cda6..1772fcb21c15cd 100644
--- a/path.c
+++ b/path.c
@@ -1112,6 +1112,14 @@ const char *remove_leading_path(const char *in, const char *prefix)
  * end with a '/', then the callers need to be fixed up accordingly.
  *
  */
+
+static const char *skip_slashes(const char *p)
+{
+	while (is_dir_sep(*p))
+		p++;
+	return p;
+}
+
 int normalize_path_copy_len(char *dst, const char *src, int *prefix_len)
 {
 	char *dst0;
@@ -1129,8 +1137,7 @@ int normalize_path_copy_len(char *dst, const char *src, int *prefix_len)
 	}
 	dst0 = dst;
 
-	while (is_dir_sep(*src))
-		src++;
+	src = skip_slashes(src);
 
 	for (;;) {
 		char c = *src;
@@ -1150,8 +1157,7 @@ int normalize_path_copy_len(char *dst, const char *src, int *prefix_len)
 			} else if (is_dir_sep(src[1])) {
 				/* (2) */
 				src += 2;
-				while (is_dir_sep(*src))
-					src++;
+				src = skip_slashes(src);
 				continue;
 			} else if (src[1] == '.') {
 				if (!src[2]) {
@@ -1161,8 +1167,7 @@ int normalize_path_copy_len(char *dst, const char *src, int *prefix_len)
 				} else if (is_dir_sep(src[2])) {
 					/* (4) */
 					src += 3;
-					while (is_dir_sep(*src))
-						src++;
+					src = skip_slashes(src);
 					goto up_one;
 				}
 			}
@@ -1182,6 +1187,8 @@ int normalize_path_copy_len(char *dst, const char *src, int *prefix_len)
 
 	up_one:
 		/*
+		 * strip the last component
+		 *
 		 * dst0..dst is prefix portion, and dst[-1] is '/';
 		 * go up one level.
 		 */
diff --git a/t/t2004-checkout-cache-temp.sh b/t/t2004-checkout-cache-temp.sh
index b92d96fdc4ed5f..0afe0ff7ca1f31 100755
--- a/t/t2004-checkout-cache-temp.sh
+++ b/t/t2004-checkout-cache-temp.sh
@@ -42,7 +42,7 @@ test_expect_success 'checkout one stage 0 to temporary file' '
 	test_line_count = 1 actual &&
 	test $(cut "-d	" -f2 actual) = path1 &&
 	p=$(cut "-d	" -f1 actual) &&
-	test -f $p &&
+	test_path_is_file $p &&
 	test $(cat $p) = tree1path1
 '
 
@@ -55,7 +55,7 @@ test_expect_success 'checkout all stage 0 to temporary files' '
 	do
 		test $(grep $f actual | cut "-d	" -f2) = $f &&
 		p=$(grep $f actual | cut "-d	" -f1) &&
-		test -f $p &&
+		test_path_is_file $p &&
 		test $(cat $p) = tree1$f || return 1
 	done
 '
@@ -71,7 +71,7 @@ test_expect_success 'checkout one stage 2 to temporary file' '
 	test_line_count = 1 actual &&
 	test $(cut "-d	" -f2 actual) = path1 &&
 	p=$(cut "-d	" -f1 actual) &&
-	test -f $p &&
+	test_path_is_file $p &&
 	test $(cat $p) = tree2path1
 '
 
@@ -83,7 +83,7 @@ test_expect_success 'checkout all stage 2 to temporary files' '
 	do
 		test $(grep $f actual | cut "-d	" -f2) = $f &&
 		p=$(grep $f actual | cut "-d	" -f1) &&
-		test -f $p &&
+		test_path_is_file $p &&
 		test $(cat $p) = tree2$f || return 1
 	done
 '
@@ -108,9 +108,9 @@ test_expect_success 'checkout all stages/one file to temporary files' '
 	test_line_count = 1 actual &&
 	test $(cut "-d	" -f2 actual) = path1 &&
 	cut "-d	" -f1 actual | (read s1 s2 s3 &&
-	test -f $s1 &&
-	test -f $s2 &&
-	test -f $s3 &&
+	test_path_is_file $s1 &&
+	test_path_is_file $s2 &&
+	test_path_is_file $s3 &&
 	test $(cat $s1) = tree1path1 &&
 	test $(cat $s2) = tree2path1 &&
 	test $(cat $s3) = tree3path1)
@@ -143,8 +143,8 @@ test_expect_success 'checkout some stages/one file to temporary files' '
 	test $(cut "-d	" -f2 actual) = path2 &&
 	cut "-d	" -f1 actual | (read s1 s2 s3 &&
 	test $s1 = . &&
-	test -f $s2 &&
-	test -f $s3 &&
+	test_path_is_file $s2 &&
+	test_path_is_file $s3 &&
 	test $(cat $s2) = tree2path2 &&
 	test $(cat $s3) = tree3path2)
 '
@@ -162,9 +162,9 @@ test_expect_success '-- path0: no entry' '
 test_expect_success '-- path1: all 3 stages' '
 	test $(grep path1 actual | cut "-d	" -f2) = path1 &&
 	grep path1 actual | cut "-d	" -f1 | (read s1 s2 s3 &&
-	test -f $s1 &&
-	test -f $s2 &&
-	test -f $s3 &&
+	test_path_is_file $s1 &&
+	test_path_is_file $s2 &&
+	test_path_is_file $s3 &&
 	test $(cat $s1) = tree1path1 &&
 	test $(cat $s2) = tree2path1 &&
 	test $(cat $s3) = tree3path1)
@@ -174,8 +174,8 @@ test_expect_success '-- path2: no stage 1, have stage 2 and 3' '
 	test $(grep path2 actual | cut "-d	" -f2) = path2 &&
 	grep path2 actual | cut "-d	" -f1 | (read s1 s2 s3 &&
 	test $s1 = . &&
-	test -f $s2 &&
-	test -f $s3 &&
+	test_path_is_file $s2 &&
+	test_path_is_file $s3 &&
 	test $(cat $s2) = tree2path2 &&
 	test $(cat $s3) = tree3path2)
 '
@@ -183,9 +183,9 @@ test_expect_success '-- path2: no stage 1, have stage 2 and 3' '
 test_expect_success '-- path3: no stage 2, have stage 1 and 3' '
 	test $(grep path3 actual | cut "-d	" -f2) = path3 &&
 	grep path3 actual | cut "-d	" -f1 | (read s1 s2 s3 &&
-	test -f $s1 &&
+	test_path_is_file $s1 &&
 	test $s2 = . &&
-	test -f $s3 &&
+	test_path_is_file $s3 &&
 	test $(cat $s1) = tree1path3 &&
 	test $(cat $s3) = tree3path3)
 '
@@ -193,8 +193,8 @@ test_expect_success '-- path3: no stage 2, have stage 1 and 3' '
 test_expect_success '-- path4: no stage 3, have stage 1 and 3' '
 	test $(grep path4 actual | cut "-d	" -f2) = path4 &&
 	grep path4 actual | cut "-d	" -f1 | (read s1 s2 s3 &&
-	test -f $s1 &&
-	test -f $s2 &&
+	test_path_is_file $s1 &&
+	test_path_is_file $s2 &&
 	test $s3 = . &&
 	test $(cat $s1) = tree1path4 &&
 	test $(cat $s2) = tree2path4)
@@ -203,7 +203,7 @@ test_expect_success '-- path4: no stage 3, have stage 1 and 3' '
 test_expect_success '-- asubdir/path5: no stage 2 and 3 have stage 1' '
 	test $(grep asubdir/path5 actual | cut "-d	" -f2) = asubdir/path5 &&
 	grep asubdir/path5 actual | cut "-d	" -f1 | (read s1 s2 s3 &&
-	test -f $s1 &&
+	test_path_is_file $s1 &&
 	test $s2 = . &&
 	test $s3 = . &&
 	test $(cat $s1) = tree1asubdir/path5)
@@ -216,7 +216,7 @@ test_expect_success 'checkout --temp within subdir' '
 		test_line_count = 1 actual &&
 		test $(grep path5 actual | cut "-d	" -f2) = path5 &&
 		grep path5 actual | cut "-d	" -f1 | (read s1 s2 s3 &&
-		test -f ../$s1 &&
+		test_path_is_file ../$s1 &&
 		test $s2 = . &&
 		test $s3 = . &&
 		test $(cat ../$s1) = tree1asubdir/path5)
@@ -230,7 +230,7 @@ test_expect_success 'checkout --temp symlink' '
 	test_line_count = 1 actual &&
 	test $(cut "-d	" -f2 actual) = path6 &&
 	p=$(cut "-d	" -f1 actual) &&
-	test -f $p &&
+	test_path_is_file $p &&
 	test $(cat $p) = path7
 '
 
diff --git a/t/t3701-add-interactive.sh b/t/t3701-add-interactive.sh
index 5ce9c6dd60e9b0..6e120a40011238 100755
--- a/t/t3701-add-interactive.sh
+++ b/t/t3701-add-interactive.sh
@@ -1441,5 +1441,105 @@ test_expect_success 'EOF quits' '
 	test_grep file out &&
 	test_grep ! file2 out
 '
+for cmd in add checkout reset "stash save" "stash push"
+do
+	test_expect_success "$cmd rejects invalid --no-auto-advance options" '
+		test_must_fail git $cmd --no-auto-advance 2>actual &&
+		test_grep -E  "requires .*--(interactive|patch)" actual
+	'
+done
+
+test_expect_success 'manual advance (">") moves to next file with --no-auto-advance' '
+	git reset --hard &&
+	echo line1 >first-file &&
+	echo line2 >second-file &&
+	git add -A &&
+	git commit -m initial >/dev/null 2>&1 &&
+	echo change_first >>first-file &&
+	echo change_second >>second-file &&
+
+	printf ">\nq\n" | git add -p --no-auto-advance >output.test 2>&1 &&
+	test_grep  -E "(a|b)/second-file" output.test
+'
+
+test_expect_success 'select n on a hunk, go to another file, come back and change to y stages' '
+	git reset --hard &&
+	echo one >f1 &&
+	echo one >f2 &&
+	git add -A &&
+	git commit -m initial >/dev/null 2>&1 &&
+	echo change1 >>f1 &&
+	echo change2 >>f2 &&
+
+	printf "n\n>\n<\ny\nq\n" | git add -p --no-auto-advance >output.staged 2>&1 &&
+	git diff --cached --name-only >staged &&
+	test_grep -E "(a/f1)" output.staged
+'
+
+test_expect_success 'select y on a hunk, go to another file, come back and change to n does not stage' '
+	git reset --hard &&
+	echo one >f1 &&
+	echo one >f2 &&
+	git add -A &&
+	git commit -m initial >/dev/null 2>&1 &&
+	echo change1 >>f1 &&
+	echo change2 >>f2 &&
+
+	printf "y\n>\n<\nn\nq\n" | git add -p --no-auto-advance >output.unstaged 2>&1 &&
+	git diff --cached --name-only >staged &&
+	test_must_be_empty staged
+'
+
+test_expect_success 'deciding all hunks in a file does not auto advance' '
+	git reset --hard &&
+	echo line >stay &&
+	echo line >other &&
+	git add -A &&
+	git commit -m initial >/dev/null 2>&1 &&
+	echo change >>stay &&
+	echo change >>other &&
+	test_write_lines y | git add -p --no-auto-advance >raw-output 2>&1 &&
+	test_grep "(1/1) Stage this hunk (was: y)" raw-output &&
+	test_grep ! "diff --git a/stay b/stay" raw-output
+'
+test_expect_success 'HUNKS SUMMARY does not show in help text when there are undecided hunks' '
+	git reset --hard &&
+	test_write_lines 1 2 3 4 5 6 7 8 9 >f &&
+	git add f &&
+	git commit -m initial >/dev/null 2>&1 &&
+	test_write_lines 1 X 3 4 Y 6 7 Z 9 >f &&
+	test_write_lines s y n | git add -p --no-auto-advance >raw-nostat 2>&1 &&
+	test_grep ! "HUNKS SUMMARY - Hunks: " raw-nostat
+'
+
+test_expect_success 'help text shows HUNK SUMMARY when all hunks have been decided' '
+	git reset --hard &&
+	test_write_lines 1 2 3 4 5 6 7 8 9 >f2 &&
+	git add f2 &&
+	git commit -m initial >/dev/null 2>&1 &&
+	test_write_lines 1 X 3 4 Y 6 7 Z 9 >f2 &&
+	printf "s\ny\nn\ny\n?\n" | git add -p --no-auto-advance >raw-stat 2>&1 &&
+	test_grep "HUNKS SUMMARY - Hunks: 3, USE: 2, SKIP: 1" raw-stat
+'
+
+test_expect_success 'selective staging across multiple files with --no-advance' '
+	git reset --hard &&
+	test_write_lines 1 2 3 4 5 6 7 8 9 >a.file &&
+	test_write_lines 1 2 3 4 5 6 7 8 9 >b.file &&
+	test_write_lines 1 2 3 4 5 6 7 8 9 >c.file &&
+	git add -A &&
+	git commit -m initial >/dev/null 2>&1 &&
+	test_write_lines 1 A2 3 4 A5 6 7 8 9 >a.file &&
+	test_write_lines 1 2 B3 4 5 6 7 B8 9 >b.file &&
+	test_write_lines C1 2 3 4 5 C6 7 8 9 >c.file &&
+	printf "s\ny\nn\n>\ns\nn\ny\n>\ns\ny\ny\nq\n" | git add -p --no-auto-advance >output.index 2>&1 &&
+	git diff --cached >staged.diff &&
+	test_grep "+A2" staged.diff &&
+	test_grep ! "+A5" staged.diff &&
+	test_grep "+B8" staged.diff &&
+	test_grep ! "+B3" staged.diff &&
+	test_grep "+C1" staged.diff &&
+	test_grep "+C6" staged.diff
+'
 
 test_done
diff --git a/t/t4067-diff-partial-clone.sh b/t/t4067-diff-partial-clone.sh
index 72f25de44950ae..30813109ac044e 100755
--- a/t/t4067-diff-partial-clone.sh
+++ b/t/t4067-diff-partial-clone.sh
@@ -132,6 +132,37 @@ test_expect_success 'diff with rename detection batches blobs' '
 	test_line_count = 1 done_lines
 '
 
+test_expect_success 'diff succeeds even if prefetch triggered by break-rewrites' '
+	test_when_finished "rm -rf server client trace" &&
+
+	test_create_repo server &&
+	echo xyz >server/foo &&
+	mkdir server/bar &&
+	test_seq -f "line %d" 1 100 >server/bar/baz &&
+	git -C server add -A &&
+	git -C server commit -m x &&
+
+	echo xyzz >server/foo &&
+	test_seq -f "line %d" 90 190 >server/bar/baz &&
+	git -C server add -A &&
+	git -C server commit -m x &&
+
+	test_config -C server uploadpack.allowfilter 1 &&
+	test_config -C server uploadpack.allowanysha1inwant 1 &&
+	git clone --filter=blob:limit=0 "file://$(pwd)/server" client &&
+
+	# Fetch bar/baz without fetching foo.
+	# Foo will be lazily fetched during break rewrites detection.
+	git -C client checkout HEAD~1 bar &&
+
+	# Ensure baz in the working tree is different from baz in HEAD~1.
+	# We need baz to trigger break-rewrites detection.
+	git -C client reset --hard HEAD &&
+
+	# break-rewrites detction in reset.
+	git -C client reset HEAD~1
+'
+
 test_expect_success 'diff succeeds even if entries are removed from queue' '
 	test_when_finished "rm -rf server client trace" &&
 
diff --git a/t/t9902-completion.sh b/t/t9902-completion.sh
index ffb9c8b522e269..2f9a597ec7f493 100755
--- a/t/t9902-completion.sh
+++ b/t/t9902-completion.sh
@@ -2601,6 +2601,7 @@ test_expect_success 'double dash "git checkout"' '
 	--ignore-skip-worktree-bits Z
 	--ignore-other-worktrees Z
 	--recurse-submodules Z
+	--auto-advance Z
 	--progress Z
 	--guess Z
 	--no-guess Z