in src/mod_rivet_ng/mod_rivet_cache.c [72:80]
void RivetCache_Create (apr_pool_t *p, rivet_thread_interp* interp_obj)
{
interp_obj->objCacheList =
apr_pcalloc(p,(signed)((interp_obj->cache_size)*sizeof(char *)));
interp_obj->objCache =
apr_pcalloc(p,sizeof(Tcl_HashTable));
Tcl_InitHashTable(interp_obj->objCache,TCL_STRING_KEYS);
}