}
	send(c, sg, cas.elem, func() { selunlock(scases, lockorder) }, 2)
	if debugSelect {
		print("syncsend: cas0=", cas0, " c=", c, "\n")
	}
	goto retc

retc:
	if caseReleaseTime > 0 {
		blockevent(caseReleaseTime-t0, 1)
	}
	return casi, recvOK

sclose:
	// send on closed channel
	selunlock(scases, lockorder)
	panic(plainError("send on closed channel"))
}