Fix a reference for Buffer that breaks backward compatibility

benchmark/pom.xml

@@ -34,15 +34,15 @@
             <dependency>
                 <groupId>net.openhft</groupId>
                 <artifactId>third-party-bom</artifactId>
-                <version>3.26.0</version>
+                <version>3.27ea0-SNAPSHOT</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>
 
             <dependency>
                 <groupId>net.openhft</groupId>
                 <artifactId>chronicle-bom</artifactId>
-                <version>2.26ea-SNAPSHOT</version>
+                <version>2.27ea-SNAPSHOT</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>

pom.xml

@@ -6,13 +6,13 @@
     <parent>
         <groupId>net.openhft</groupId>
         <artifactId>java-parent-pom</artifactId>
-        <version>1.26.0</version>
+        <version>1.27ea0-SNAPSHOT</version>
         <relativePath />
     </parent>
 
     <artifactId>chronicle-map</artifactId>
 
-    <version>3.26ea5-SNAPSHOT</version>
+    <version>3.27ea0-SNAPSHOT</version>
     <name>OpenHFT/Chronicle-Map</name>
     <description>Chronicle-Map</description>
     <packaging>bundle</packaging>
@@ -28,15 +28,15 @@
             <dependency>
                 <groupId>net.openhft</groupId>
                 <artifactId>third-party-bom</artifactId>
-                <version>3.26.0</version>
+                <version>3.27ea0-SNAPSHOT</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>
 
             <dependency>
                 <groupId>net.openhft</groupId>
                 <artifactId>chronicle-bom</artifactId>
-                <version>2.26ea-SNAPSHOT</version>
+                <version>2.27ea-SNAPSHOT</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>

src/main/java/net/openhft/chronicle/map/ChronicleMapBuilder.java

@@ -54,6 +54,7 @@
 import java.io.*;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Modifier;
+import java.nio.Buffer;
 import java.nio.ByteBuffer;
 import java.nio.channels.FileChannel;
 import java.util.HashMap;
@@ -401,7 +402,9 @@ private static <K, V> ByteBuffer writeHeader(@NotNull final FileChannel fileChan
         headerBuffer.putInt(SIZE_WORD_OFFSET, NOT_COMPLETE | DATA | headerSize);
 
         // Write the size-prefixed blob to the file
-        headerBuffer.position(0);
+        @SuppressWarnings("UnnecessaryLocalVariable")
+        Buffer bufferForBackwardCompatibility = headerBuffer;
+        bufferForBackwardCompatibility.position(0);
         headerBuffer.limit(headerLimit);
         writeFully(fileChannel, 0, headerBuffer);