From 2bfb2a6daeb344e4a2a588200739200c35d147f5 Mon Sep 17 00:00:00 2001
From: Jaron Kent-Dobias <jaron@kent-dobias.com>
Date: Fri, 3 Nov 2017 00:09:51 -0400
Subject: added another warning

---
 src/wolff.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'src')

diff --git a/src/wolff.c b/src/wolff.c
index 9fb7eb3..b44ccab 100644
--- a/src/wolff.c
+++ b/src/wolff.c
@@ -247,6 +247,10 @@ int main(int argc, char *argv[]) {
       printf("WARNING: correlation function never hit the noise floor.\n");
     }
 
+    if (n < 1) {
+      printf("WARNING: correlation function only has one nonnegative term.\n");
+    }
+
     double *conv_Gamma = get_convex_minorant(n, Gammas);
 
     double ttau = - 0.5;
-- 
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