If a method has a parameter which is a bounded wildcard the return type may not

FULL PRODUCT VERSION :
java -version
java version "1.8.0_05"
Java(TM) SE Runtime Environment (build 1.8.0_05-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.5-b02, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Mac OS 10.9.3
Linux 2.6.32-431.el6.x86_64 #1 SMP Fri Nov 22 03:15:09 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux

EXTRA RELEVANT SYSTEM CONFIGURATION :
this appears to be platform independent

A DESCRIPTION OF THE PROBLEM :
If a method has a parameter which is a bounded wildcard the return type may not be respected if a raw type is passed in.

The below code results in this error:

       Reproducer.java:15: error: incompatible types: Object cannot be converted to Kind
        Kind a = LookupUtil.getMap(idAsList).get(id);

Code:

        // if the list has a type witness, then the issue does not reproduce.
        //List<Number> idAsList = new ArrayList<Number>();
        List idAsList = new ArrayList<Number>();
        Kind a = LookupUtil.getMap(idAsList).get(id);


REGRESSION. Last worked in version 7u60

ADDITIONAL REGRESSION INFORMATION:
java version "1.7.0_60"
Java(TM) SE Runtime Environment (build 1.7.0_60-b19)
Java HotSpot(TM) 64-Bit Server VM (build 24.60-b09, mixed mode)

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
uncompress the attached archive. run the reproducer.sh script and the compiler error will reproduce.

reproducer.sh, compiles the source in src and creates a jar file. it then tries to compiler Reproducer.java using the classes in the jar file.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
I expected the compile to succeed.
ACTUAL -
compiler error

ERROR MESSAGES/STACK TRACES THAT OCCUR :
Reproducer.java:15: error: incompatible types: Object cannot be converted to Kind
        Kind a = LookupUtil.getMap(idAsList).get(id);
                                                ^


REPRODUCIBILITY :
This bug can be reproduced always.

CUSTOMER SUBMITTED WORKAROUND :
don't use a raw type for the parameter

        Long id = 1L;
        List<Number> idAsList = new ArrayList<Number>();
        Kind a = LookupUtil.getMap(idAsList).get(id);