From b1be9258b4f22257f5c45cabc9566e6702beb8b3 Mon Sep 17 00:00:00 2001
From: Vladimir Lagunov <lagunov.vladimir@gmail.com>
Date: Tue, 26 May 2020 19:56:29 +0700
Subject: [PATCH] Fix NPE in OpenSSHKnownHosts (#579)

Co-authored-by: Vladimir Lagunov <vladimir.lagunov@jetbrains.com>
---
 .../schmizz/sshj/transport/verification/OpenSSHKnownHosts.java  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main/java/net/schmizz/sshj/transport/verification/OpenSSHKnownHosts.java b/src/main/java/net/schmizz/sshj/transport/verification/OpenSSHKnownHosts.java
index 670d41cfc..b04f95932 100644
--- a/src/main/java/net/schmizz/sshj/transport/verification/OpenSSHKnownHosts.java
+++ b/src/main/java/net/schmizz/sshj/transport/verification/OpenSSHKnownHosts.java
@@ -387,7 +387,7 @@ public String getLine() {
             line.append(" ").append(type.toString());
             line.append(" ").append(getKeyString(key));
 
-            if (!comment.isEmpty()) line.append(" ").append(comment);
+            if (comment != null && !comment.isEmpty()) line.append(" ").append(comment);
 
             return line.toString();
         }