jtreg test UpdateManifest.java creates temp files with names like system-out-err3413844635142383445.txt


cat -n jdk/test/tools/jar/UpdateManifest.java
  [...]
    48 File tmp = File.createTempFile("system-out-err", ".txt");
    49 tmp.deleteOnExit();

The tmp.deleteOnExit(); does not seem to have an effect. The Mach 5 Windows build/test systems are accumulating system-out-err*.txt files in /cygdrive/c/temp.