From 0068b25132bec04dda44885b6226de673a6dc8d0 Mon Sep 17 00:00:00 2001
From: Mitchel <mitchellabonte@hotmail.com>
Date: Fri, 2 Mar 2018 18:21:08 -0500
Subject: [PATCH] Fix for Java infinite loop encoding into 0-sized buffer
 (#4654)

---
 java/com/google/flatbuffers/FlatBufferBuilder.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/java/com/google/flatbuffers/FlatBufferBuilder.java b/java/com/google/flatbuffers/FlatBufferBuilder.java
index 0214fd265..f98fbedce 100644
--- a/java/com/google/flatbuffers/FlatBufferBuilder.java
+++ b/java/com/google/flatbuffers/FlatBufferBuilder.java
@@ -196,7 +196,7 @@ public class FlatBufferBuilder {
         int old_buf_size = bb.capacity();
         if ((old_buf_size & 0xC0000000) != 0)  // Ensure we don't grow beyond what fits in an int.
             throw new AssertionError("FlatBuffers: cannot grow buffer beyond 2 gigabytes.");
-        int new_buf_size = old_buf_size << 1;
+        int new_buf_size = old_buf_size == 0 ? 1 : old_buf_size << 1;
         bb.position(0);
         ByteBuffer nbb = bb_factory.newByteBuffer(new_buf_size);
         nbb.position(new_buf_size - old_buf_size);