Allow peeled references without trailing newline at end of file

Also ammends one of the tag tests to make sure it's working.

src/refs.c

@@ -328,7 +328,7 @@ static int packed_parse_peel(
 	if (git__prefixcmp(tag_ref->name, GIT_REFS_TAGS_DIR) != 0)
 		goto corrupt;
 
-	if (buffer + GIT_OID_HEXSZ >= buffer_end)
+	if (buffer + GIT_OID_HEXSZ > buffer_end)
 		goto corrupt;
 
 	/* Is this a valid object id? */
@@ -339,10 +339,14 @@ static int packed_parse_peel(
 	if (*buffer == '\r')
 		buffer++;
 
-	if (*buffer != '\n')
-		goto corrupt;
+	if (buffer != buffer_end) {
+		if (*buffer == '\n')
+			buffer++;
+		else
+			goto corrupt;
+	}
 
-	*buffer_out = buffer + 1;
+	*buffer_out = buffer;
 	return 0;
 
 corrupt:

tests-clar/object/tag/read.c

@@ -62,6 +62,7 @@ void test_object_tag_read__parse_without_tagger(void)
    git_tag *bad_tag;
    git_commit *commit;
    git_oid id, id_commit;
+   git_strarray ref_list;
 
    // TODO: This is a little messy
    cl_git_pass(git_repository_open(&bad_tag_repo, cl_fixture("bad_tag.git")));
@@ -81,6 +82,9 @@ void test_object_tag_read__parse_without_tagger(void)
 
    cl_assert(git_oid_cmp(&id_commit, git_commit_id(commit)) == 0);
 
+   cl_git_pass(git_reference_list(&ref_list, bad_tag_repo, GIT_REF_LISTALL));
+
+   git_strarray_free(&ref_list);
    git_tag_free(bad_tag);
    git_commit_free(commit);
    git_repository_free(bad_tag_repo);

tests-clar/resources/bad_tag.git/packed-refs

 # pack-refs with: peeled 
 eda9f45a2a98d4c17a09d681d88569fa4ea91755 refs/tags/e90810b
 ^e90810b8df3e80c413d903f631643c716887138d
+d3bacb8d3ff25876a961b1963b6515170d0151ab refs/tags/hello
+^6dcf9bf7541ee10456529833502442f385010c3d
\ No newline at end of file