From 5a784dcb0c25cc46ba5a91c272cf37e120de61da Mon Sep 17 00:00:00 2001
From: Arnaud Roques <plantuml@gmail.com>
Date: Fri, 4 Mar 2022 20:25:35 +0100
Subject: [PATCH] Fix issue

---
 src/net/sourceforge/plantuml/graphic/TextBlockLineBefore.java | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/net/sourceforge/plantuml/graphic/TextBlockLineBefore.java b/src/net/sourceforge/plantuml/graphic/TextBlockLineBefore.java
index d19e859d0..c94df58f4 100644
--- a/src/net/sourceforge/plantuml/graphic/TextBlockLineBefore.java
+++ b/src/net/sourceforge/plantuml/graphic/TextBlockLineBefore.java
@@ -100,7 +100,9 @@ public class TextBlockLineBefore extends AbstractTextBlock implements TextBlock,
 
 	@Override
 	public Ports getPorts(StringBounder stringBounder) {
-		return ((WithPorts) textBlock).getPorts(stringBounder);
+		if (textBlock instanceof WithPorts)
+			return ((WithPorts) textBlock).getPorts(stringBounder);
+		return new Ports();
 	}
 
 }
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