toRealPath throws InternalError: Should not get here on Windows (paths with junctions)

[Dawid Weiss]

This must be more complicated than I thought because the same code
passes with flying colors on another (fairly fresh install) of Windows
10... I don't know what the difference is, to be honest (I have
Windows 10 Pro N). I'll try to dig deeper, time permitting, but
perhaps a comment on the eventual Jira issue would be sensible (can't
do it myself, no Jira access).

Dawid

On Tue, Mar 15, 2016 at 1:01 PM, Dawid Weiss <dawid.weiss at gmail.com> wrote:
> I filed an issue (Review ID: JI-9032181). In any case, I checked with
> Java 7, 8 and the ea:
>
> Java(TM) SE Runtime Environment (build
> 9-ea+109-2016-03-09-181019.javare.4620.nc)
>
> The issue only affects Windows 10 (tested on 64-bit only), Windows 7
> behaves fine. The following sequence is enough to get the stack trace:
>
> mkdir foo
> mklink /J bar foo
> java -cp . Test bar
>
> The Test.java code is:
> import java.io.*;
> import java.nio.file.*;
>
> public class Test {
>   public static void main(String[] args) throws Exception {
>     Path p = Paths.get(args[0]);
>     System.out.println("p.toRealPath(): " + p.toRealPath());
>   }
> }
>
> and the stack trace:
>
> Exception in thread "main" java.lang.InternalError: Should not get here
>         at sun.nio.fs.WindowsNativeDispatcher.GetFinalPathNameByHandle(Native
> Method)
>         at sun.nio.fs.WindowsLinkSupport.getFinalPath(WindowsLinkSupport.java:77)
>         at sun.nio.fs.WindowsLinkSupport.getRealPath(WindowsLinkSupport.java:242)
>         at sun.nio.fs.WindowsPath.toRealPath(WindowsPath.java:840)
>         at sun.nio.fs.WindowsPath.toRealPath(WindowsPath.java:44)
>         at Test.main(Test.java:10)
>
> Dawid
>
> On Tue, Mar 15, 2016 at 12:28 PM, Alan Bateman <Alan.Bateman at oracle.com> wrote:
>> On 15/03/2016 11:19, Dawid Weiss wrote:
>>>
>>> I couldn't find an appropriate bug in bugzilla, but this fails
>>> reliably for me with Java 8 and 9 on Windows 10, 64-bit:
>>>
>>> mkdir foo
>>> mklink /J bar foo
>>> cd bar
>>> java -cp Test .
>>>
>>> where Test.java is as simple as:
>>>
>>> import java.io.*;
>>> import java.nio.file.*;
>>>
>>> public class Test {
>>>    public static void main(String[] args) throws Exception {
>>>      System.out.println("p.toRealPath(): " +
>>> Paths.get(args[0]).toRealPath());
>>>    }
>>> }
>>>
>>> The thrown error shows:
>>>
>>> Exception in thread "main" java.lang.InternalError: Should not get here
>>>          at
>>> sun.nio.fs.WindowsNativeDispatcher.GetFinalPathNameByHandle(Native
>>> Method)
>>
>> There are a number of win32 functions that this code uses GetProcAddress to
>> get their address in kernel32. This dates back to when we had to support
>> Windows XP. This should be cleaned up now. Doesn't explain why you are
>> seeing though, can you submit a bug?
>>
>> -Alan