1 files changed, 28 insertions, 24 deletions

diff --git a/builtin/rev-parse.c b/builtin/rev-parse.c
index 74aa644cbb..4f49e96bfd 100644
--- a/builtin/rev-parse.c
+++ b/builtin/rev-parse.c
@@ -159,7 +159,7 @@ static void show_rev(int type, const struct object_id *oid, const char *name)
 		}
 	}
 	else if (abbrev)
-		show_with_type(type, find_unique_abbrev(oid->hash, abbrev));
+		show_with_type(type, find_unique_abbrev(oid, abbrev));
 	else
 		show_with_type(type, oid_to_hex(oid));
 }
@@ -243,28 +243,28 @@ static int show_file(const char *arg, int output_prefix)
 static int try_difference(const char *arg)
 {
 	char *dotdot;
-	struct object_id oid;
-	struct object_id end;
-	const char *next;
-	const char *this;
+	struct object_id start_oid;
+	struct object_id end_oid;
+	const char *end;
+	const char *start;
 	int symmetric;
 	static const char head_by_default[] = "HEAD";
 
 	if (!(dotdot = strstr(arg, "..")))
 		return 0;
-	next = dotdot + 2;
-	this = arg;
-	symmetric = (*next == '.');
+	end = dotdot + 2;
+	start = arg;
+	symmetric = (*end == '.');
 
 	*dotdot = 0;
-	next += symmetric;
+	end += symmetric;
 
-	if (!*next)
-		next = head_by_default;
+	if (!*end)
+		end = head_by_default;
 	if (dotdot == arg)
-		this = head_by_default;
+		start = head_by_default;
 
-	if (this == head_by_default && next == head_by_default &&
+	if (start == head_by_default && end == head_by_default &&
 	    !symmetric) {
 		/*
 		 * Just ".."?  That is not a range but the
@@ -274,14 +274,18 @@ static int try_difference(const char *arg)
 		return 0;
 	}
 
-	if (!get_oid_committish(this, &oid) && !get_oid_committish(next, &end)) {
-		show_rev(NORMAL, &end, next);
-		show_rev(symmetric ? NORMAL : REVERSED, &oid, this);
+	if (!get_oid_committish(start, &start_oid) && !get_oid_committish(end, &end_oid)) {
+		show_rev(NORMAL, &end_oid, end);
+		show_rev(symmetric ? NORMAL : REVERSED, &start_oid, start);
 		if (symmetric) {
 			struct commit_list *exclude;
 			struct commit *a, *b;
-			a = lookup_commit_reference(&oid);
-			b = lookup_commit_reference(&end);
+			a = lookup_commit_reference(&start_oid);
+			b = lookup_commit_reference(&end_oid);
+			if (!a || !b) {
+				*dotdot = '.';
+				return 0;
+			}
 			exclude = get_merge_bases(a, b);
 			while (exclude) {
 				struct commit *commit = pop_commit(&exclude);
@@ -328,12 +332,12 @@ static int try_parent_shorthands(const char *arg)
 		return 0;
 
 	*dotdot = 0;
-	if (get_oid_committish(arg, &oid)) {
+	if (get_oid_committish(arg, &oid) ||
+	    !(commit = lookup_commit_reference(&oid))) {
 		*dotdot = '^';
 		return 0;
 	}
 
-	commit = lookup_commit_reference(&oid);
 	if (exclude_parent &&
 	    exclude_parent > commit_list_count(commit->parents)) {
 		*dotdot = '^';
@@ -516,7 +520,7 @@ static int cmd_parseopt(int argc, const char **argv, const char *prefix)
 			PARSE_OPT_SHELL_EVAL);
 
 	strbuf_addstr(&parsed, " --");
-	sq_quote_argv(&parsed, argv, 0);
+	sq_quote_argv(&parsed, argv);
 	puts(parsed.buf);
 	return 0;
 }
@@ -526,7 +530,7 @@ static int cmd_sq_quote(int argc, const char **argv)
 	struct strbuf buf = STRBUF_INIT;
 
 	if (argc)
-		sq_quote_argv(&buf, argv, 0);
+		sq_quote_argv(&buf, argv);
 	printf("%s\n", buf.buf);
 	strbuf_release(&buf);
 
@@ -887,8 +891,8 @@ int cmd_rev_parse(int argc, const char **argv, const char *prefix)
 				if (read_cache() < 0)
 					die(_("Could not read the index"));
 				if (the_index.split_index) {
-					const unsigned char *sha1 = the_index.split_index->base_sha1;
-					const char *path = git_path("sharedindex.%s", sha1_to_hex(sha1));
+					const struct object_id *oid = &the_index.split_index->base_oid;
+					const char *path = git_path("sharedindex.%s", oid_to_hex(oid));
 					strbuf_reset(&buf);
 					puts(relative_path(path, prefix, &buf));
 				}