patch, 3 partsgit-fsck: report missing author/commit line in a commit as an error

diff --git a/builtin-fsck.c b/builtin-fsck.c
index 6fc9525..cc7524b 100644
--- a/builtin-fsck.c
+++ b/builtin-fsck.c
@@ -360,6 +360,9 @@ static int fsck_commit(struct commit *commit)
 		fprintf(stderr, "Checking commit %s\n",
 			sha1_to_hex(commit->object.sha1));
 
+	if (!commit->date)
+		return objerror(&commit->object, "invalid author/committer line");
+
 	if (memcmp(buffer, "tree ", 5))
 		return objerror(&commit->object, "invalid format - expected 'tree' line");
 	if (get_sha1_hex(buffer+5, tree_sha1) || buffer[45] != '\n')
@@ -378,9 +381,6 @@ static int fsck_commit(struct commit *commit)
 		return objerror(&commit->object, "could not load commit's tree %s", tree_sha1);
 	if (!commit->parents && show_root)
 		printf("root %s\n", sha1_to_hex(commit->object.sha1));
-	if (!commit->date)
-		printf("bad commit date in %s\n",
-		       sha1_to_hex(commit->object.sha1));
 	return 0;
 }
 

diff --git a/builtin-fsck.c b/builtin-fsck.c
index cc7524b..ba785ec 100644
--- a/builtin-fsck.c
+++ b/builtin-fsck.c
@@ -354,7 +354,7 @@ static int fsck_tree(struct tree *item)
 static int fsck_commit(struct commit *commit)
 {
 	char *buffer = commit->buffer;
-	unsigned char tree_sha1[20], sha1[20];
+	unsigned char tree_sha1[20];
 
 	if (verbose)
 		fprintf(stderr, "Checking commit %s\n",
@@ -363,22 +363,17 @@ static int fsck_commit(struct commit *commit)
 	if (!commit->date)
 		return objerror(&commit->object, "invalid author/committer line");
 
-	if (memcmp(buffer, "tree ", 5))
-		return objerror(&commit->object, "invalid format - expected 'tree' line");
-	if (get_sha1_hex(buffer+5, tree_sha1) || buffer[45] != '\n')
+	if (get_sha1_hex(buffer+5, tree_sha1))
 		return objerror(&commit->object, "invalid 'tree' line format - bad sha1");
 	buffer += 46;
-	while (!memcmp(buffer, "parent ", 7)) {
-		if (get_sha1_hex(buffer+7, sha1) || buffer[47] != '\n')
-			return objerror(&commit->object, "invalid 'parent' line format - bad sha1");
+	while (!memcmp(buffer, "parent ", 7))
 		buffer += 48;
-	}
 	if (memcmp(buffer, "author ", 7))
 		return objerror(&commit->object, "invalid format - expected 'author' line");
 	free(commit->buffer);
 	commit->buffer = NULL;
 	if (!commit->tree)
-		return objerror(&commit->object, "could not load commit's tree %s", tree_sha1);
+		return objerror(&commit->object, "could not load commit's tree %s", sha1_to_hex(tree_sha1));
 	if (!commit->parents && show_root)
 		printf("root %s\n", sha1_to_hex(commit->object.sha1));
 	return 0;

diff --git a/object.c b/object.c
index 5a5ebe2..4e7f27a 100644
--- a/object.c
+++ b/object.c
@@ -140,7 +140,8 @@ struct object *parse_object_buffer(const unsigned char *sha1, enum object_type t
 	if (type == OBJ_BLOB) {
 		struct blob *blob = lookup_blob(sha1);
 		if (blob) {
-			parse_blob_buffer(blob, buffer, size);
+			if (parse_blob_buffer(blob, buffer, size))
+				return NULL;
 			obj = &blob->object;
 		}
 	} else if (type == OBJ_TREE) {
@@ -148,14 +149,16 @@ struct object *parse_object_buffer(const unsigned char *sha1, enum object_type t
 		if (tree) {
 			obj = &tree->object;
 			if (!tree->object.parsed) {
-				parse_tree_buffer(tree, buffer, size);
+				if (parse_tree_buffer(tree, buffer, size))
+					return NULL;
 				eaten = 1;
 			}
 		}
 	} else if (type == OBJ_COMMIT) {
 		struct commit *commit = lookup_commit(sha1);
 		if (commit) {
-			parse_commit_buffer(commit, buffer, size);
+			if (parse_commit_buffer(commit, buffer, size))
+				return NULL;	
 			if (!commit->buffer) {
 				commit->buffer = buffer;
 				eaten = 1;
@@ -165,7 +168,8 @@ struct object *parse_object_buffer(const unsigned char *sha1, enum object_type t
 	} else if (type == OBJ_TAG) {
 		struct tag *tag = lookup_tag(sha1);
 		if (tag) {
-			parse_tag_buffer(tag, buffer, size);
+			if (parse_tag_buffer(tag, buffer, size))
+			       return NULL;
 			obj = &tag->object;
 		}
 	} else {