FULL PRODUCT VERSION :
> java -version
java version "1.7.0-ea"
Java(TM) SE Runtime Environment (build 1.7.0-ea-b135)
Java HotSpot(TM) Client VM (build 21.0-b05, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
> uname -a
Linux riedquat 2.6.22.19-0.4-default #1 SMP 2009-08-14 02:09:16 +0200 i686 i686 i386 GNU/Linux


A DESCRIPTION OF THE PROBLEM :
javac -Xlint:all complains about a flush() on an auto-closeable resource in the corresponding try-block.

Additional information about this bug can also be found at:
http://www.riedquat.de/blog/2011-03-30-03

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Compile sample source:
javac -Xlint:all Test.java

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Compiles w/o warnings.
ACTUAL -
> javac -Xlint:all Test.java
Test.java:8: warning: [try] explicit call to close() on an auto-closeable resource
            out.flush();
               ^
1 warning


ERROR MESSAGES/STACK TRACES THAT OCCUR :
> javac -Xlint:all Test.java
Test.java:8: warning: [try] explicit call to close() on an auto-closeable resource
            out.flush();
               ^
1 warning


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.io.IOException;
import java.io.OutputStream;

public class Test {
    public static void main(final String... args) throws IOException {
        try (final OutputStream out = System.out;) {
            out.write("foo\n".getBytes());
            out.flush();
        }
    }
}

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

CUSTOMER SUBMITTED WORKAROUND :
No workaround found.