Merge branch 'tr/maint-1.6.3-add-p-modeonly-fix' into maint-1.6.3

* tr/maint-1.6.3-add-p-modeonly-fix:
  add -p: do not attempt to coalesce mode changes
  git add -p: demonstrate failure when staging both mode and hunk

Author: gitster

git-add--interactive.perl

@@ -841,6 +841,10 @@ sub coalesce_overlapping_hunks {
 	my ($last_o_ctx, $last_was_dirty);
 
 	for (grep { $_->{USE} } @in) {
+		if ($_->{TYPE} ne 'hunk') {
+			push @out, $_;
+			next;
+		}
 		my $text = $_->{TEXT};
 		my ($o_ofs) = parse_hunk_header($text->[0]);
 		if (defined $last_o_ctx &&

t/t3701-add-interactive.sh

@@ -163,6 +163,17 @@ test_expect_success FILEMODE 'stage mode but not hunk' '
 	git diff          file | grep "+content"
 '
 
+
+test_expect_success FILEMODE 'stage mode and hunk' '
+	git reset --hard &&
+	echo content >>file &&
+	chmod +x file &&
+	printf "y\\ny\\n" | git add -p &&
+	git diff --cached file | grep "new mode" &&
+	git diff --cached file | grep "+content" &&
+	test -z "$(git diff file)"
+'
+
 # end of tests disabled when filemode is not usable
 
 test_expect_success 'setup again' '