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Issue parsec_fatal when the datatype_arenas have not been set in the PTG #739

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Issue parsec_fatal when the datatype_arenas have not been set in the PTG #739

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5 changes: 4 additions & 1 deletion parsec/remote_dep_mpi.c
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
/*
* Copyright (c) 2009-2024 The University of Tennessee and The University
* Copyright (c) 2009-2025 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2023 NVIDIA CORPORATION. All rights reserved.
Expand Down Expand Up @@ -778,6 +778,9 @@ remote_dep_mpi_retrieve_datatype(parsec_execution_stream_t *eu,
/* control dep */
return PARSEC_ITERATE_STOP;
}
if(output->data.remote.dst_datatype == NULL) {
parsec_fatal("Retrieving MPI datatype for %s [dep_datatype_index %x] found count=%d, but the datatype is NULL. Forgetting to set the arena_datatypes in a PTG taskpool is usually the root cause.", newcontext->task_class->name, dep->dep_datatype_index, output->data.remote.dst_count);
}
if(old_dtt != PARSEC_DATATYPE_NULL) {
if(old_dtt != output->data.remote.dst_datatype) {
#if defined(PARSEC_DEBUG_NOISIER)
Expand Down