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-rw-r--r--erts/emulator/beam/erl_process.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/erts/emulator/beam/erl_process.c b/erts/emulator/beam/erl_process.c
index b47ce97c46..f6afc066ce 100644
--- a/erts/emulator/beam/erl_process.c
+++ b/erts/emulator/beam/erl_process.c
@@ -7497,6 +7497,15 @@ erts_schedule_misc_op(void (*func)(void *), void *arg)
ErtsRunQueue *rq = erts_get_runq_current(NULL);
ErtsMiscOpList *molp = misc_op_list_alloc();
+ if (!rq) {
+ /*
+ * This can only happen when the sys msg dispatcher
+ * thread schedules misc ops (this happens *very*
+ * seldom; only when trace drivers are unloaded).
+ */
+ rq = ERTS_RUNQ_IX(0);
+ }
+
erts_smp_runq_lock(rq);
while (rq->misc.evac_runq) {