From 793b83fda84da33e07adfab467a68dc649565401 Mon Sep 17 00:00:00 2001
From: Vincent Langlet <VincentLanglet@users.noreply.github.com>
Date: Sun, 4 Nov 2018 07:18:56 +0100
Subject: [PATCH] Avoid null value (#27570)

---
 scss/mixins/_breakpoints.scss | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scss/mixins/_breakpoints.scss b/scss/mixins/_breakpoints.scss
index cfdb1976b3..23a5de96be 100644
--- a/scss/mixins/_breakpoints.scss
+++ b/scss/mixins/_breakpoints.scss
@@ -16,7 +16,7 @@
 //    md
 @function breakpoint-next($name, $breakpoints: $grid-breakpoints, $breakpoint-names: map-keys($breakpoints)) {
   $n: index($breakpoint-names, $name);
-  @return if($n < length($breakpoint-names), nth($breakpoint-names, $n + 1), null);
+  @return if($n != null and $n < length($breakpoint-names), nth($breakpoint-names, $n + 1), null);
 }
 
 // Minimum breakpoint width. Null for the smallest (first) breakpoint.