javax.tools.JavaCompilerTool.getStandardFileManager().list() includes
directories, however, the specification mentions that the framework
has no concept of directories.

The following test cases demonstrates the problem:

--- begin: T6340549.java ---
import javax.tools.*;
import java.util.*;
import java.io.*;

import static javax.tools.JavaFileObject.Kind;

public class T6340549 {
    public static void main(String... args) throws Exception {

	// Ensure a directory exits
	File dir = new File("temp" + args.hashCode());
	if (!dir.exists())
	    dir.mkdir();
	if (!dir.isDirectory())
	    throw new AssertionError("Not a directory " + dir);

	try {
	    JavaCompilerTool compiler = ToolProvider.defaultJavaCompiler();
	    JavaFileManager jfm = compiler.getStandardFileManager();

	    for (JavaFileObject jfo : jfm.list(".", EnumSet.of(Kind.OTHER))) {
		if (new File(jfo.getPath()).isDirectory()) {
		    throw new AssertionError("Found directory: " + jfo);
		}
	    }
	} finally {
	    dir.delete(); // cleanup
	}

    }
}
--- end: T6340549.java ---

Tried in WINDOWS 2K with JDK-build 1.6.0-auto-294
<java-version>
java version "1.6.0-auto"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.6.0-auto-294)
Java HotSpot(TM) Client VM (build 1.6.0-ea-b57, mixed mode)
<\java-version>