FULL PRODUCT VERSION :
java version "1.8.0_05"
Java(TM) SE Runtime Environment (build 1.8.0_05-b13)
Java HotSpot(TM) Client VM (build 25.5-b02, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows [Version 6.1.7601]

A DESCRIPTION OF THE PROBLEM :
java.lang.InternalError: Should not get here
	at sun.nio.fs.WindowsNativeDispatcher.CreateSymbolicLink0(Native Method)
	at sun.nio.fs.WindowsNativeDispatcher.CreateSymbolicLink(Unknown Source)
	at sun.nio.fs.WindowsFileSystemProvider.createSymbolicLink(Unknown Source)
	at java.nio.file.Files.createSymbolicLink(Unknown Source)
	at org.eclipse.jgit.util.FileUtil.createSymLink(FileUtil.java:96)
	at org.eclipse.jgit.util.FS_Win32_Java7.detectSymlinkSupport(FS_Win32_Java7.java:80)
	at org.eclipse.jgit.util.FS_Win32_Java7.supportsSymlinks(FS_Win32_Java7.java:71)
	at org.eclipse.egit.core.ContainerTreeIterator$ResourceEntry.<init>(ContainerTreeIterator.java:295)

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Run the attached sample code on windows platform.

When I run it as Administrator - no problem.  When I run it as user in administrator group - it doesn����t work. 

I checked the setting in temporary folder  - my user has  FULL Access to targed directory. 

Other informations could be found in https://bugs.eclipse.org/bugs/show_bug.cgi?id=436137
 

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Link created or some IOException about bad rights, or root cause of the problem.
ACTUAL -
Exception in thread "main" java.lang.InternalError: Should not get here
	at sun.nio.fs.WindowsNativeDispatcher.CreateSymbolicLink0(Native Method)


ERROR MESSAGES/STACK TRACES THAT OCCUR :
Exception in thread "main" java.lang.InternalError: Should not get here
	at sun.nio.fs.WindowsNativeDispatcher.CreateSymbolicLink0(Native Method)
	at sun.nio.fs.WindowsNativeDispatcher.CreateSymbolicLink(Unknown Source)
	at sun.nio.fs.WindowsFileSystemProvider.createSymbolicLink(Unknown Source)
	at java.nio.file.Files.createSymbolicLink(Unknown Source)
	at uu.os.samples.TestSimlink.createSymLink(TestSimlink.java:47)
	at uu.os.samples.TestSimlink.detectSymlinkSupport(TestSimlink.java:29)
	at uu.os.samples.TestSimlink.main(TestSimlink.java:19)

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
package uu.os.samples;

import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.LinkOption;
import java.nio.file.Path;

public class TestSimlink {
  
  static boolean supportSymlinks = false;

  public static void main(String[] args) {

    TestSimlink tsm = new TestSimlink();
    tsm.detectSymlinkSupport();
    System.out.println("Result: " + supportSymlinks);
  }

  private void detectSymlinkSupport() {
    File tempFile = null;
    try {
      tempFile = File.createTempFile("tempsymlinktarget2", ""); //$NON-NLS-1$ //$NON-NLS-2$
      File linkName = new File(tempFile.getParentFile(), "tempsymlink2"); //$NON-NLS-1$
      createSymLink(linkName, tempFile.getPath());
      supportSymlinks = Boolean.TRUE;
      linkName.delete();
    } catch (IOException e) {
      supportSymlinks = Boolean.FALSE;
    } finally { 
      if (tempFile != null)
        tempFile.delete();
    }
  }

  public static void createSymLink(File path, String target) throws IOException {
    Path nioPath = path.toPath();
    if (Files.exists(nioPath, LinkOption.NOFOLLOW_LINKS))
      Files.delete(nioPath);
    if (true)  
      target = target.replace('/', '\\');
    Path nioTarget = new File(target).toPath();
    Files.createSymbolicLink(nioPath, nioTarget);
  }
}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Run java as Administrator