GraalVM CE 21: java.nio.file.InvalidPathException

Dockerfile

FROM ghcr.io/graalvm/graalvm-community:21 AS build

WORKDIR /app
COPY NioPath.java .
RUN javac NioPath.java && native-image -Dsun.jnu.encoding=UTF-8 NioPath

FROM debian:12-slim AS production
COPY --from=build /app/niopath /bin/niopath
CMD ["/bin/niopath", "àéïõû.txt"]

NioPath.java

import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.charset.Charset;
import java.nio.ByteBuffer;
import java.io.File;

public class NioPath {
  public static void main(String[] args) {
    test("UTF-8", args[0]);
    test(System.getProperty("file.encoding"), args[0]);
    test(System.getProperty("sun.jnu.encoding"), args[0]);
    test(System.getProperty("sun.jnu.encoding"), "àéïõûy.txt");

    // throws java.nio.file.InvalidPathException
    try { System.out.println(Paths.get(args[0])); }
    catch (Throwable th) { System.out.println(th); }

    // ok
    try { System.out.println(new File(args[0])); }
    catch (Throwable th) { System.out.println(th); }

    // throws java.nio.file.InvalidPathException
    try { System.out.println(Paths.get(new File(args[0]).toURI())); }
    catch (Throwable th) { System.out.println(th); }

    // throws java.nio.file.InvalidPathException
    try { System.out.println(new File(args[0]).toPath()); }
    catch (Throwable th) { System.out.println(th); }
  }

  private static void test(String charsetName, String value) {
    System.out.println("testing with charset: " + charsetName);
    Charset charset = Charset.forName(charsetName);
    ByteBuffer encoded = charset.encode(value);
    System.out.print("encoded: ");
    while (encoded.hasRemaining()) {
      System.out.print(Integer.toHexString(encoded.get() & 0xff));
    }
    System.out.print("\n");
  }
}