if flags&(_SigThrow|_SigPanic) == 0 {
		return
	}

	mp.throwing = throwTypeRuntime
	mp.caughtsig.set(gp)

	if crashing.Load() == 0 {
		startpanic_m()
	}

	gp = fatalsignal(sig, c, gp, mp)

	level, _, docrash := gotraceback()
	if level > 0 {
		goroutineheader(gp)
		tracebacktrap(c.sigpc(), c.sigsp(), c.siglr(), gp)