ncclIbIsend() double check "comm->base.ready"

[ecjtusbs]

ncclIbIsend() double check "comm->base.ready"

nccl/src/transport/net_ib.cc

Line 1950 in 80f6bda

if (comm->base.ready == 0) { WARN("NET/IB: ncclIbIsend() called when comm->base.ready == 0"); return ncclInternalError; }

nccl/src/transport/net_ib.cc

Line 1951 in 80f6bda

if (comm->base.ready == 0) { *request = NULL; return ncclSuccess; }

if (comm->base.ready == 0) { WARN("NET/IB: ncclIbIsend() called when comm->base.ready == 0"); return ncclInternalError; }
if (comm->base.ready == 0) { *request = NULL; return ncclSuccess; } //when should we arrive here?

[GeofferyGeng]

It seems that this issue has been mentioned in #1489