From 063632d08e21d4d685bc700f2a3d53e29ce8ffb9 Mon Sep 17 00:00:00 2001
From: archmoj <mojtaba@plot.ly>
Date: Sat, 28 Mar 2020 22:19:14 -0400
Subject: [PATCH] check for Infinity in rangebreak l2p

---
 src/plots/cartesian/set_convert.js | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/plots/cartesian/set_convert.js b/src/plots/cartesian/set_convert.js
index 277bc0c81dc..b6aa9971600 100644
--- a/src/plots/cartesian/set_convert.js
+++ b/src/plots/cartesian/set_convert.js
@@ -222,7 +222,10 @@ module.exports = function setConvert(ax, fullLayout) {
                     break;
                 }
             }
-            return _l2p(v, (isY ? -1 : 1) * ax._m2, ax._B[q]);
+            var b2 = ax._B[q] || 0;
+            if(!isFinite(b2)) return 0; // avoid NaN translate e.g. in positionLabels if one keep zooming exactly into a break
+
+            return _l2p(v, (isY ? -1 : 1) * ax._m2, b2);
         };
 
         p2l = function(px) {
@@ -242,8 +245,8 @@ module.exports = function setConvert(ax, fullLayout) {
                 if(pos < brk.pmin) break;
                 if(pos > brk.pmax) q = nextI;
             }
-
-            return _p2l(px, (isY ? -1 : 1) * ax._m2, ax._B[q]);
+            var b2 = ax._B[q];
+            return _p2l(px, (isY ? -1 : 1) * ax._m2, b2);
         };
     }