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-rw-r--r--erts/emulator/beam/erl_process.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/erts/emulator/beam/erl_process.c b/erts/emulator/beam/erl_process.c
index 43e84a1be1..88c1b5c121 100644
--- a/erts/emulator/beam/erl_process.c
+++ b/erts/emulator/beam/erl_process.c
@@ -5542,6 +5542,9 @@ init_scheduler_data(ErtsSchedulerData* esdp, int num,
esdp->thr_id = (Uint32) num;
erts_sched_bif_unique_init(esdp);
+ esdp->io.out = (Uint64) 0;
+ esdp->io.in = (Uint64) 0;
+
if (daww_ptr) {
init_aux_work_data(&esdp->aux_work_data, esdp, *daww_ptr);
#ifdef ERTS_SMP