This is a unit-test-only leak, but let's fix it anyway so it doesn't hide real bugs. Bug not in any released version of Tor.
@@ -82,6 +82,8 @@ build_unopened_fourhop(struct timeval circ_start_time)
onion_append_hop(&or_circ->cpath, fakehop);
+ tor_free(fakehop);
+
return or_circ;
}