fixup! status: add status serialization mechanism

We must ensure that the path to the index file is available when
validating the index.

This fixes t7522.{2,3,4,5,7,8,9,10,11,12,13}.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

wt-status-deserialize.c

@@ -568,8 +568,6 @@ static int wt_deserialize_parse(const struct wt_status *cmd_s, struct wt_status
 	const char *line;
 	const char *arg;
 
-	memset(s, 0, sizeof(*s));
-
 	if ((line = my_packet_read_line(fd, &line_len)) &&
 	    (skip_prefix(line, "version ", &arg))) {
 		int version = (int)strtol(arg, NULL, 10);
@@ -613,6 +611,12 @@ static int wt_deserialize_fd(const struct wt_status *cmd_s, struct wt_status *de
 		return DESERIALIZE_ERR;
 	}
 
+	/*
+	 * Copy over some required fields from the current command.
+	 */
+	des_s->repo = cmd_s->repo;
+	des_s->index_file = cmd_s->index_file;
+
 	/*
 	 * Deserialize cached status
 	 */
@@ -700,7 +704,6 @@ static int wt_deserialize_fd(const struct wt_status *cmd_s, struct wt_status *de
 	/*
 	 * Copy over display-related fields from the current command.
 	 */
-	des_s->repo = cmd_s->repo;
 	des_s->verbose = cmd_s->verbose;
 	/* amend */
 	/* whence */