FULL PRODUCT VERSION :
java version "1.6.0_05"
Java(TM) SE Runtime Environment (build 1.6.0_05-b13)
Java HotSpot(TM) Client VM (build 10.0-b19, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
Windows XP

A DESCRIPTION OF THE PROBLEM :
The compiler should not issue a warning, because it actually infers the correct type. It does not issue an error, which means that it accepts the assignment of the result of Arrays.asList() to a variable of type List<Integer> without a cast, which means that it correctly inferred the type Integer for the type parameter T of method Arrays.asList().

I stumbled upon this while reading "Java Generics and Collections" by Wadler and Naftalin. Page 12 contains an example similar to this one.


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
javac -Xlint:unchecked Test.java

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Should compile without warnings.
ACTUAL -
Compiler prints:

Test.java:2: warning: [unchecked] unchecked generic array creation of type T[] for varargs parameter
  java.util.List<Integer> ints = java.util.Arrays.asList();
                                                        ^
1 warning

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
class Test {
  java.util.List<Integer> ints = java.util.Arrays.asList();
}

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

CUSTOMER SUBMITTED WORKAROUND :
Supply explicit type argument:

java.util.List<Integer> ints = java.util.Arrays.<Integer>asList();