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-rw-r--r--erts/emulator/beam/break.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/erts/emulator/beam/break.c b/erts/emulator/beam/break.c
index 4dad5736c5..0b40d70cb7 100644
--- a/erts/emulator/beam/break.c
+++ b/erts/emulator/beam/break.c
@@ -512,6 +512,8 @@ do_break(void)
erts_free_read_env(mode);
#endif /* __WIN32__ */
+ ASSERT(erts_smp_thr_progress_is_blocking());
+
erts_printf("\n"
"BREAK: (a)bort (c)ontinue (p)roc info (i)nfo (l)oaded\n"
" (v)ersion (k)ill (D)b-tables (d)istribution\n");