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Florian Schmaus
c9826d526b
While Ant runs on Java 8, it is hit by API changes of ByteBuffer.flip(): The flip() method returns Buffer in Java 8 and ByteBuffer in Java 9. If Ant is now emerged and build using Java 8, and then run with Java 9 (or higher), a NoSuchMethodError is potentially thrown invoking ant: BUILD FAILED /var/tmp/portage/net-vpn/i2p-1.6.1/work/i2p-1.6.1/build.xml:1634: java.lang.NoSuchMethodError: java.nio.CharBuffer.flip()Ljava/nio/CharBuffer; at org.apache.tools.ant.util.ReaderInputStream.<init>(ReaderInputStream.java:81) at org.apache.tools.ant.util.ReaderInputStream.<init>(ReaderInputStream.java:66) at org.apache.tools.ant.util.ReaderInputStream.<init>(ReaderInputStream.java:118) at org.apache.tools.ant.util.ReaderInputStream.<init>(ReaderInputStream.java:93) at org.apache.tools.ant.taskdefs.Concat$ConcatResource.getInputStream(Concat.java:421) at org.apache.tools.ant.util.ResourceUtils.copyUsingStreams(ResourceUtils.java:766) at org.apache.tools.ant.util.ResourceUtils.copyResource(ResourceUtils.java:437) at org.apache.tools.ant.taskdefs.Concat.execute(Concat.java:802) at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292) at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:99) at org.apache.tools.ant.Task.perform(Task.java:350) at org.apache.tools.ant.Target.execute(Target.java:449) at org.apache.tools.ant.Target.performTasks(Target.java:470) at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1401) at org.apache.tools.ant.Project.executeTarget(Project.java:1374) at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41) at org.apache.tools.ant.Project.executeTargets(Project.java:1264) at org.apache.tools.ant.Main.runBuild(Main.java:827) at org.apache.tools.ant.Main.startAnt(Main.java:223) at org.apache.tools.ant.launch.Launcher.run(Launcher.java:284) Raising the minimum required Java version to 9 fixes this. Closes: https://bugs.gentoo.org/839093 Signed-off-by: Florian Schmaus <flow@gentoo.org>