From b41d40cc95100fe0fd16d39b543e86036f87c2df Mon Sep 17 00:00:00 2001
From: Jan Oberhauser <jan.oberhauser@gmail.com>
Date: Fri, 7 Feb 2020 17:06:36 -0800
Subject: [PATCH] :bug: Fix error with displaying null in expression

---
 packages/editor-ui/src/components/ParameterInput.vue | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/editor-ui/src/components/ParameterInput.vue b/packages/editor-ui/src/components/ParameterInput.vue
index 74c123b521..9f65d462e4 100644
--- a/packages/editor-ui/src/components/ParameterInput.vue
+++ b/packages/editor-ui/src/components/ParameterInput.vue
@@ -276,7 +276,7 @@ export default mixins(
 					returnValue = this.expressionValueComputed;
 				}
 
-				if (returnValue !== undefined && this.parameter.type === 'string') {
+				if (returnValue !== undefined && returnValue !== null && this.parameter.type === 'string') {
 					const rows = this.getArgument('rows');
 					if (rows === undefined || rows === 1) {
 						returnValue = returnValue.toString().replace(/\n/, '|');