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-rw-r--r--src/or/rephist.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/or/rephist.c b/src/or/rephist.c
index 1dea9fa85c..72a9f4a812 100644
--- a/src/or/rephist.c
+++ b/src/or/rephist.c
@@ -588,6 +588,7 @@ rep_hist_get_bandwidth_lines(void)
cp = buf;
for (r=0;r<2;++r) {
b = r?read_array:write_array;
+ tor_assert(b);
format_iso_time(t, b->next_period-NUM_SECS_BW_SUM_INTERVAL);
tor_snprintf(cp, len-(cp-buf), "opt %s %s (%d s) ", r?"read-history ":"write-history", t,
NUM_SECS_BW_SUM_INTERVAL);