ring communication *is* called with outbut set to NULL, so don't error out on that. (948f4783) · Commits · 郑智淋 / lammps

src/comm.cpp

+1 −6

Original line number	Diff line number	Diff line
		@@ -696,7 +696,7 @@ void Comm::ring(int n, int nper, void *inbuf, int messtag,

		if (maxbytes == 0) return;

		// sanity check 1
		// sanity check

		if ((nbytes > 0) && inbuf == NULL)
		error->one(FLERR,"Cannot put data on ring from NULL pointer");
		@@ -722,11 +722,6 @@ void Comm::ring(int n, int nper, void *inbuf, int messtag,
		if (self \|\| loop < nprocs-1) callback(nbytes/nper,buf,ptr);
		}

		// sanity check 2

		if ((nbytes > 0) && outbuf == NULL)
		error->one(FLERR,"Cannot put data from ring to NULL pointer");

		if (nbytes && outbuf) memcpy(outbuf,buf,nbytes);

		memory->destroy(buf);