kohsuke/winp — pull request #10 by jglick (2014-07-17 12:16:53+00:00)
Title: Better report errors from corrupted JARs.

Amends dc7f5b1.
```
java.io.IOException: Remote call on … failed
at hudson.remoting.Channel.call(Channel.java:731)
at hudson.Launcher$RemoteLauncher.kill(Launcher.java:887)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:608)
at hudson.model.Run.execute(Run.java:1676)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:231)
Caused by: java.lang.Error: java.util.zip.ZipException: zip file is empty
at org.jvnet.winp.Native.md5(Native.java:74)
at org.jvnet.winp.Native.load(Native.java:109)
at org.jvnet.winp.Native.(Native.java:55)
at org.jvnet.winp.WinProcess.enableDebugPrivilege(WinProcess.java:200)
at hudson.util.ProcessTree$Windows.(ProcessTree.java:477)
at hudson.util.ProcessTree.get(ProcessTree.java:336)
at hudson.Launcher$RemoteLauncher$KillTask.call(Launcher.java:899)
at hudson.Launcher$RemoteLauncher$KillTask.call(Launcher.java:890)
at hudson.remoting.UserRequest.perform(UserRequest.java:118)
at hudson.remoting.UserRequest.perform(UserRequest.java:48)
at hudson.remoting.Request$2.run(Request.java:328)
at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72)
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.util.zip.ZipException: zip file is empty
at java.util.zip.ZipFile.open(Native Method)
at java.util.zip.ZipFile.(Unknown Source)
at java.util.zip.ZipFile.(Unknown Source)
at java.util.jar.JarFile.(Unknown Source)
at java.util.jar.JarFile.(Unknown Source)
at sun.net.www.protocol.jar.URLJarFile.(Unknown Source)
at sun.net.www.protocol.jar.URLJarFile.getJarFile(Unknown Source)
at sun.net.www.protocol.jar.JarFileFactory.get(Unknown Source)
at sun.net.www.protocol.jar.JarURLConnection.connect(Unknown Source)
at sun.net.www.protocol.jar.JarURLConnection.getInputStream(Unknown Source)
at java.net.URL.openStream(Unknown Source)
at org.jvnet.winp.Native.md5(Native.java:61)
... 16 more
```