ADDITIONAL SYSTEM INFORMATION :
Windows 11, Java 24.0.1

A DESCRIPTION OF THE PROBLEM :
Certain Windows symbolic links will trigger a StringIndexOutOfBoundsException when calling WindowsPath.relativize().

```
Exception in thread "main" java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
at java.base/jdk.internal.util.Preconditions$1.apply(Preconditions.java:55)
at java.base/jdk.internal.util.Preconditions$1.apply(Preconditions.java:52)
at java.base/jdk.internal.util.Preconditions$4.apply(Preconditions.java:213)
at java.base/jdk.internal.util.Preconditions$4.apply(Preconditions.java:210)
at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:98)
at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:106)
at java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:302)
at java.base/java.lang.String.checkIndex(String.java:4917)
at java.base/java.lang.StringLatin1.charAt(StringLatin1.java:46)
at java.base/java.lang.String.charAt(String.java:1616)
at java.base/sun.nio.fs.WindowsPath.normalize(WindowsPath.java:528)
at java.base/sun.nio.fs.WindowsPath.relativize(WindowsPath.java:424)
at java.base/sun.nio.fs.WindowsPath.relativize(WindowsPath.java:42)
```

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
- Create the directory `C:\Temp\dir`.
- Create the directory `C:\Temp\other\dir`.
- In `C:\Temp\other\dir`, execute the command `mklink /D link "..\\..\\dir"`.

This should result in the following file system contents:

```
c:\Temp\other\dir>dir
 Volume in drive C has no label.
 Volume Serial Number is 368F-72D1

 Directory of c:\Temp\other\dir

19/06/2025 13:28 <DIR> .
19/06/2025 13:27 <DIR> ..
19/06/2025 13:28 <SYMLINKD> link [..\\..\\dir]
```

Note that although the use of `\\` might be uncommon, Windows can still handle it properly, and operations like `cd link` will function as expected.

Now, run the following code snippet to trigger the StringIndexOutOfBoundsException:

```
public static void main(String[] args) throws IOException {
final Path linkPath = Path.of("C:\\temp\\other\\dir\\link");
final Path link = Files.readSymbolicLink(linkPath);
final Path badRoot = linkPath.getParent().resolve(link);
final Path badFile = badRoot.resolve("file");
badRoot.relativize(badFile);
}
```


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
No crash.
ACTUAL -
Crash

---------- BEGIN SOURCE ----------
public static void main(String[] args) throws IOException {
final Path linkPath = Path.of("C:\\temp\\other\\dir\\link");
final Path link = Files.readSymbolicLink(linkPath);
final Path badRoot = linkPath.getParent().resolve(link);
final Path badFile = badRoot.resolve("file");
badRoot.relativize(badFile);
}

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