--- groovy-core-GROOVY_1_8_9/build.xml	2013-02-15 09:42:29.000000000 +0100
+++ groovy-core-GROOVY_1_8_9/build.xml	2018-12-18 11:19:59.976323534 +0100
@@ -92,7 +92,7 @@
                 srcdir="config/ant/src"
                 destdir="${targetDirectory}/tools"
                 includeantruntime="false"
-                source="1.5" target="1.5" fork="true" classpathref="compilePath"/>
+                source="1.8" target="1.8" fork="true" classpathref="compilePath"/>
         <java classpath="${targetDirectory}/tools"
               classpathref="compilePath"
               classname="org.codehaus.groovy.ExceptionUtilsGenerator">
@@ -176,7 +176,7 @@
         <mkdir dir="${mainClassesDirectory}/META-INF"/>
 
         <javac srcdir="${mainSourcePath}" includeantruntime="false" destdir="${mainClassesDirectory}"
-               deprecation="on" debug="yes" source="1.5" target="1.5" fork="true" classpathref="compilePath">
+               deprecation="on" debug="yes" source="1.8" target="1.8" fork="true" classpathref="compilePath">
             <exclude name="groovy/ui/**/*.java"/>
         </javac>
         <java classname="org.codehaus.groovy.tools.DgmConverter"
@@ -200,7 +200,7 @@
                 <pathelement path="${mainClassesDirectory}"/>
                 <path refid="compilePath"/>
             </classpath>
-            <javac deprecation="on" debug="yes" source="1.5" target="1.5"/>
+            <javac deprecation="on" debug="yes" source="1.8" target="1.8"/>
         </groovyc>
     </target>
 
@@ -248,7 +248,7 @@
                 <path refid="groovyMainClasses"/>
                 <path refid="testLibPath"/>
             </classpath>
-            <javac source="1.5" target="1.5" nowarn="on"/>
+            <javac source="1.8" target="1.8" nowarn="on"/>
         </groovyc>
     </target>
 
@@ -264,8 +264,7 @@
                 <path refid="groovyMainClasses"/>
                 <path refid="testLibPath"/>
             </classpath>
-            <!-- currently not needed, add in if/when required -->
-            <!--<javac source="1.5" target="1.5" nowarn="on"/>-->
+            <javac source="1.8" target="1.8" nowarn="on"/>
         </groovyc>
     </target>
 
@@ -287,8 +286,8 @@
         </groovyc>
         <javac srcdir="${examplesSourceDirectory}"
                destdir="${examplesClassesDirectory}"
-               source="1.5"
-               target="1.5"
+               source="1.8"
+               target="1.8"
                fork="true">
             <classpath>
                 <pathelement path="${mainClassesDirectory}"/>
@@ -308,7 +307,7 @@
                 <path refid="compilePath"/>
                 <path refid="examplesPath"/>
             </classpath>
-            <javac source="1.5" target="1.5"/>
+            <javac source="1.8" target="1.8"/>
         </groovyc>
 
     </target>
@@ -777,7 +776,7 @@
             unless="_skipDocs_" description="Create the javadoc documentation.">
         <javadoc destdir="${docsDirectory}/api" author="true" version="true"
                  windowtitle="${title}" doctitle="${title}"
-                 encoding="ISO-8859-1" useexternalfile="true" source="1.5"
+                 encoding="ISO-8859-1" useexternalfile="true" source="1.8"
                  footer="${docFooter}"
                  overview="src/main/overviewj.html"
                  maxmemory="${javaDoc_mx}"