From a8ccd093aa2511e47a5cbcd9b857e1071ac10d9d Mon Sep 17 00:00:00 2001
From: Leo Singer <leo.singer@ligo.org>
Date: Tue, 11 Sep 2018 22:46:53 -0400
Subject: [PATCH] Do not try to thin by less than 1 sample

---
 ligo/skymap/bayestar/ez_emcee.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ligo/skymap/bayestar/ez_emcee.py b/ligo/skymap/bayestar/ez_emcee.py
index 664647e..eb43633 100644
--- a/ligo/skymap/bayestar/ez_emcee.py
+++ b/ligo/skymap/bayestar/ez_emcee.py
@@ -124,7 +124,7 @@ def ez_emcee(log_prob_fn, lo, hi, nindep=200,
             progress.set_description('Checking')
             acl = sampler.get_autocorr_time()[0].max()
             if np.isfinite(acl):
-                acl = int(np.ceil(acl))
+                acl = min(1, int(np.ceil(acl)))
             accept = np.mean(sampler.acceptance_fraction[0])
             progress.set_postfix(acl=acl, accept=accept)
 
-- 
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