pset_write_queue 6465 src/process.c      pset_write_queue (p, Fcons (entry, p->write_queue));
pset_write_queue 6467 src/process.c      pset_write_queue (p, nconc2 (p->write_queue, list1 (entry)));
pset_write_queue 6485 src/process.c    pset_write_queue (p, XCDR (p->write_queue));