Apply patch.txt from bug attachment and run the test. After FileUtils.copyDirectory() is called, you can no longer write a file into the target directory (pwd).

----------System.out:(1/80)----------
copyDirectory("/jdk3/tmp/jtreg/work/classes/jdk/test/lib/FileUtilsTest.d", ".")
----------System.err:(21/1380)----------
java.nio.file.NoSuchFileException: file2.txt
at java.base/sun.nio.fs.UnixException.translateToIOException(UnixException.java:92)
at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:106)
at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:111)
at java.base/sun.nio.fs.UnixFileSystemProvider.newFileChannel(UnixFileSystemProvider.java:213)
at java.base/sun.nio.fs.UnixFileSystemProvider.newByteChannel(UnixFileSystemProvider.java:244)
at java.base/java.nio.file.spi.FileSystemProvider.newOutputStream(FileSystemProvider.java:426)
at java.base/java.nio.file.Files.newOutputStream(Files.java:215)
at java.base/java.nio.file.Files.write(Files.java:3174)
at java.base/java.nio.file.Files.writeString(Files.java:3368)
at java.base/java.nio.file.Files.writeString(Files.java:3315)
at FileUtilsTest.testCopyDirectoryToPWD(FileUtilsTest.java:135)
at FileUtilsTest.main(FileUtilsTest.java:40)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:565)
at com.sun.javatest.regtest.agent.MainActionHelper$AgentVMRunnable.run(MainActionHelper.java:335)
at java.base/java.lang.Thread.run(Thread.java:1447)