test-lib: Allow overriding of TEST_DIRECTORY

diff --git a/path.c b/path.c
index b4c8d917229a4187f36a76f43603fc036e65632e..6b23023095d7e1a5cfc1aef8db6d6e5fb56b32de 100644 (file)
--- a/path.c
+++ b/path.c
@@ -316,6 +316,8 @@ char *expand_user_path(const char *path)
                size_t username_len = first_slash - username;
                if (username_len == 0) {
                        const char *home = getenv("HOME");
+                       if (!home)
+                               goto return_null;
                        strbuf_add(&user_path, home, strlen(home));
                } else {
                        struct passwd *pw = getpw_str(username, username_len);