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@@ -638,7 +638,8 @@ choose_guard_selection(const or_options_t *options,
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*/
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static int have_warned_extreme_threshold = 0;
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- if (n_passing_filter < extreme_threshold &&
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+ if (n_guards &&
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+ n_passing_filter < extreme_threshold &&
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! have_warned_extreme_threshold) {
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have_warned_extreme_threshold = 1;
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const double exclude_frac =
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