var runtime.zerobase

4 uses

	runtime (current package)
		malloc.go#L845: var zerobase uintptr
		malloc.go#L915: 		return unsafe.Pointer(&zerobase)
		mfinal.go#L350: 		if e.data == unsafe.Pointer(&zerobase) {
		slice.go#L185: 		return slice{unsafe.Pointer(&zerobase), old.len, cap}