From a9779e12ea6bbe9015b668c5ee1ac0514da8a505 Mon Sep 17 00:00:00 2001
From: Paul Redmond <paul.redmond@gmail.com>
Date: Wed, 8 Apr 2020 11:04:37 -0400
Subject: [PATCH] AK: Appending 0 bytes to a ByteBuffer should be a no-op
 (#1699)

- inserting an empty string into LibLine Editor triggered an assertion
  trying to grow a ByteBuffer by 0 bytes.
---
 AK/ByteBuffer.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/AK/ByteBuffer.h b/AK/ByteBuffer.h
index 3f8a245fdd7..af5f98823d1 100644
--- a/AK/ByteBuffer.h
+++ b/AK/ByteBuffer.h
@@ -211,6 +211,9 @@ public:
 
     void append(const void* data, size_t data_size)
     {
+        if (data_size == 0)
+            return;
+        ASSERT(data != nullptr);
         int old_size = size();
         grow(size() + data_size);
         __builtin_memcpy(this->data() + old_size, data, data_size);